{"id":3264,"date":"2026-02-27T00:00:00","date_gmt":"2026-02-27T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/sfp-wavelengths-850nm-1310nm-1550nm-guide\/"},"modified":"2026-06-22T04:09:55","modified_gmt":"2026-06-22T04:09:55","slug":"sfp-wavelengths-850nm-1310nm-1550nm-guide","status":"publish","type":"post","link":"https:\/\/resources.l-p.com\/vi\/knowledge-center\/sfp-wavelengths-850nm-1310nm-1550nm-guide","title":{"rendered":"H\u01b0\u1edbng d\u1eabn b\u01b0\u1edbc s\u00f3ng SFP: 850nm so v\u1edbi 1310nm so v\u1edbi 1550nm"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"628\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/aa5849af7c3749969ee25e40eadd0999.jpg\" alt=\"SFP Wavelength Guide: 850nm vs. 1310nm vs. 1550nm\" class=\"wp-image-3254\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/aa5849af7c3749969ee25e40eadd0999.jpg 1200w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/aa5849af7c3749969ee25e40eadd0999-300x157.jpg 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/aa5849af7c3749969ee25e40eadd0999-1024x536.jpg 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/aa5849af7c3749969ee25e40eadd0999-768x402.jpg 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/aa5849af7c3749969ee25e40eadd0999-18x9.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Khi k\u1ef9 s\u01b0 t\u00ecm ki\u1ebfm <strong>\u201cb\u01b0\u1edbc s\u00f3ng SFP,\u201d<\/strong> h\u1ecd th\u01b0\u1eddng \u0111ang c\u1ed1 g\u1eafng tr\u1ea3 l\u1eddi m\u1ed9t c\u00e2u h\u1ecfi tri\u1ec3n khai th\u1ef1c t\u1ebf: <em>T\u00f4i n\u00ean s\u1eed d\u1ee5ng b\u01b0\u1edbc s\u00f3ng quang n\u00e0o\u2014850 nm, 1310 nm hay 1550 nm\u2014v\u00e0 t\u1ea1i sao \u0111i\u1ec1u n\u00e0y l\u1ea1i quan tr\u1ecdng?<\/em> C\u00e2u tr\u1ea3 l\u1eddi \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1p quang, kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn, \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft v\u00e0 \u0111\u1ed9 tin c\u1eady t\u1ed5ng th\u1ec3 c\u1ee7a m\u1ea1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">optical transceivers<\/a>, b\u01b0\u1edbc s\u00f3ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn b\u01b0\u1edbc s\u00f3ng trung t\u00e2m danh \u0111\u1ecbnh c\u1ee7a laser ph\u00e1t. Gi\u00e1 tr\u1ecb n\u00e0y x\u00e1c \u0111\u1ecbnh module \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1p quang \u0111a mode (MMF) hay c\u00e1p quang \u0111\u01a1n mode (SMF), m\u1ee9c \u0111\u1ed9 suy hao t\u00edn hi\u1ec7u s\u1ebd g\u1eb7p ph\u1ea3i, h\u00e0nh vi t\u00e1n s\u1eafc theo kho\u1ea3ng c\u00e1ch v\u00e0 vi\u1ec7c c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng khu\u1ebfch \u0111\u1ea1i quang ho\u1eb7c h\u1ec7 th\u1ed1ng DWDM hay kh\u00f4ng. Vi\u1ec7c ch\u1ecdn sai b\u01b0\u1edbc s\u00f3ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn l\u1ed7i li\u00ean k\u1ebft ngay l\u1eadp t\u1ee9c, hi\u1ec7u su\u1ea5t kh\u00f4ng \u1ed5n \u0111\u1ecbnh ho\u1eb7c d\u1ef1 tr\u1eef quang kh\u00f4ng \u0111\u1ee7.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ba lo\u1ea1i b\u01b0\u1edbc s\u00f3ng SFP ch\u1ee7 \u0111\u1ea1o\u2014850 nm, 1310 nm v\u00e0 1550 nm\u2014kh\u00f4ng th\u1ec3 thay th\u1ebf l\u1eabn nhau. M\u1ed7i lo\u1ea1i t\u01b0\u01a1ng \u1ee9ng v\u1edbi c\u00e1c lo\u1ea1i c\u00e1p quang c\u1ee5 th\u1ec3, c\u00e1c l\u1edbp t\u1ea7m xa v\u00e0 c\u00e1c m\u00f4i tr\u01b0\u1eddng \u1ee9ng d\u1ee5ng nh\u01b0 li\u00ean k\u1ebft ng\u1eafn trong trung t\u00e2m d\u1eef li\u1ec7u, x\u01b0\u01a1ng s\u1ed1ng khu\u00f4n vi\u00ean, t\u1eadp h\u1ee3p \u0111\u00f4 th\u1ecb ho\u1eb7c truy\u1ec1n d\u1eabn xa. Vi\u1ec7c hi\u1ec3u s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u00fang \u0111\u00f2i h\u1ecfi h\u01a1n c\u1ea3 vi\u1ec7c ghi nh\u1edb c\u00e1c con s\u1ed1 v\u1ec1 kho\u1ea3ng c\u00e1ch; n\u00f3 bao g\u1ed3m vi\u1ec7c \u0111\u00e1nh gi\u00e1 ng\u00e2n s\u00e1ch li\u00ean k\u1ebft, \u0111\u1eb7c t\u00ednh t\u00e1n s\u1eafc v\u00e0 c\u00e1c r\u00e0ng bu\u1ed9c t\u01b0\u01a1ng t\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p gi\u1ea3i th\u00edch c\u00f3 c\u1ea5u tr\u00fac \u1edf c\u1ea5p \u0111\u1ed9 k\u1ef9 thu\u1eadt v\u1ec1 b\u01b0\u1edbc s\u00f3ng SFP, bao g\u1ed3m b\u1ea3ng so s\u00e1nh, logic ng\u00e2n s\u00e1ch li\u00ean k\u1ebft, danh s\u00e1ch ki\u1ec3m tra tri\u1ec3n khai v\u00e0 c\u00e1c t\u00ecnh hu\u1ed1ng x\u1eed l\u00fd s\u1ef1 c\u1ed1 ph\u1ed5 bi\u1ebfn. D\u00f9 b\u1ea1n \u0111ang l\u1ef1a ch\u1ecdn module cho m\u1ed9t l\u1eafp \u0111\u1eb7t m\u1edbi hay ch\u1ea9n \u0111o\u00e1n t\u00ecnh tr\u1ea1ng kh\u00f4ng kh\u1edbp b\u01b0\u1edbc s\u00f3ng, m\u1ee5c ti\u00eau l\u00e0 cung c\u1ea5p th\u00f4ng tin ch\u00ednh x\u00e1c v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, s\u1eb5n s\u00e0ng \u0111\u1ec3 ra quy\u1ebft \u0111\u1ecbnh v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c th\u1ef1c ti\u1ec5n thi\u1ebft k\u1ebf m\u1ea1ng trong th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u21aa\ufe0f&nbsp;<\/strong>B\u01b0\u1edbc s\u00f3ng SFP l\u00e0 g\u00ec?<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/10a7f483a2f940588eec5d8dff5446bd-1024x576.jpg\" alt=\"SFP Wavelength\" class=\"wp-image-3255\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/10a7f483a2f940588eec5d8dff5446bd-1024x576.jpg 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/10a7f483a2f940588eec5d8dff5446bd-300x169.jpg 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/10a7f483a2f940588eec5d8dff5446bd-768x432.jpg 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/10a7f483a2f940588eec5d8dff5446bd-18x10.jpg 18w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/10a7f483a2f940588eec5d8dff5446bd.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc s\u00f3ng SFP<\/strong> \u0111\u1ec1 c\u1eadp \u0111\u1ebfn b\u01b0\u1edbc s\u00f3ng trung t\u00e2m danh \u0111\u1ecbnh c\u1ee7a laser ph\u00e1t b\u00ean trong b\u1ed9 thu ph\u00e1t quang d\u1ea1ng c\u1eafm nh\u1ecf (SFP). N\u00f3 x\u00e1c \u0111\u1ecbnh ph\u1ed5 \u00e1nh s\u00e1ng c\u1ee5 th\u1ec3\u2014th\u01b0\u1eddng l\u00e0 850 nm, 1310 nm ho\u1eb7c 1550 nm\u2014\u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u qua c\u00e1p quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc s\u00f3ng \u0111\u01b0\u1ee3c ch\u1ecdn x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1p quang. <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476091.htm\"><strong>Module SFP 850 nm<\/strong><\/a><strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1p quang \u0111a mode (MMF)<\/strong>, n\u01a1i t\u00e1n s\u1eafc mode gi\u1edbi h\u1ea1n kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn nh\u01b0ng cho ph\u00e9p c\u00e1c li\u00ean k\u1ebft ng\u1eafn chi ph\u00ed th\u1ea5p. Ng\u01b0\u1ee3c l\u1ea1i, <strong>SFP 1310 nm v\u00e0 <\/strong><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476862.htm\"><strong>SFP 1550 nm<\/strong><\/a><strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1p quang \u0111\u01a1n mode (SMF)<\/strong>, h\u1ed7 tr\u1ee3 kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn d\u00e0i h\u01a1n \u0111\u00e1ng k\u1ec3 nh\u1edd suy hao th\u1ea5p h\u01a1n v\u00e0 hi\u1ec7u \u1ee9ng t\u00e1n s\u1eafc gi\u1ea3m \u0111i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc s\u00f3ng c\u0169ng li\u00ean h\u1ec7 tr\u1ef1c ti\u1ebfp v\u1edbi ph\u00e2n lo\u1ea1i t\u1ea7m xa. V\u00ed d\u1ee5, 850 nm th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng cho c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea7m ng\u1eafn (SR) trong trung t\u00e2m d\u1eef li\u1ec7u, 1310 nm h\u1ed7 tr\u1ee3 c\u00e1c li\u00ean k\u1ebft t\u1ea7m trung (LR) trong khu\u00f4n vi\u00ean ho\u1eb7c \u0111\u00f4 th\u1ecb, c\u00f2n 1550 nm th\u01b0\u1eddng \u0111\u01b0\u1ee3c tri\u1ec3n khai cho c\u00e1c m\u00f4i tr\u01b0\u1eddng truy\u1ec1n d\u1eabn t\u1ea7m xa m\u1edf r\u1ed9ng (ER\/ZR) ho\u1eb7c truy\u1ec1n d\u1eabn xa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u21aa\ufe0f&nbsp;<\/strong>T\u1ea1i sao b\u01b0\u1edbc s\u00f3ng l\u1ea1i quan tr\u1ecdng trong b\u1ed9 thu ph\u00e1t quang?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc s\u00f3ng kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t tham s\u1ed1 g\u00e1n nh\u00e3n\u2014n\u00f3 x\u00e1c \u0111\u1ecbnh tr\u1ef1c ti\u1ebfp c\u00e1ch \u00e1nh s\u00e1ng lan truy\u1ec1n trong c\u00e1p quang, kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a n\u00f3 c\u00f3 th\u1ec3 \u0111i \u0111\u01b0\u1ee3c v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a li\u00ean k\u1ebft d\u01b0\u1edbi \u0111i\u1ec1u ki\u1ec7n l\u01b0u l\u01b0\u1ee3ng th\u1ef1c t\u1ebf. Trong thi\u1ebft k\u1ebf m\u1ea1ng th\u1ef1c ti\u1ec5n, b\u01b0\u1edbc s\u00f3ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn suy hao, t\u00e1n s\u1eafc, d\u1ef1 tr\u1eef li\u00ean k\u1ebft, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/vi\/glossary\/understanding-what-is-bit-error-rate\/\">t\u1ef7 l\u1ec7 l\u1ed7i bit<\/a> (BER), v\u00e0 th\u1eadm ch\u00ed c\u1ea3 kh\u1ea3 n\u0103ng khu\u1ebfch \u0111\u1ea1i quang.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/83ef9515cd54495a93acc55b9bc0153b.jpg\" alt=\"Wavelength Matters in Optical Transceivers\" class=\"wp-image-3256\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/83ef9515cd54495a93acc55b9bc0153b.jpg 1200w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/83ef9515cd54495a93acc55b9bc0153b-300x169.jpg 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/83ef9515cd54495a93acc55b9bc0153b-1024x576.jpg 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/83ef9515cd54495a93acc55b9bc0153b-768x432.jpg 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/83ef9515cd54495a93acc55b9bc0153b-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 suy hao c\u00e1p quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1p quang kh\u00f4ng suy hao m\u1ecdi b\u01b0\u1edbc s\u00f3ng nh\u01b0 nhau. T\u1ed5n th\u1ea5t t\u00edn hi\u1ec7u (\u0111o b\u1eb1ng dB\/km) thay \u0111\u1ed5i t\u00f9y theo c\u1eeda s\u1ed5 truy\u1ec1n d\u1eabn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/481450.htm\" target=\"_self\"><strong>MMF 850nm<\/strong><\/a><strong>:<\/strong> Suy hao cao h\u01a1n, th\u01b0\u1eddng v\u00e0o kho\u1ea3ng 2\u20133 dB\/km tr\u00ean c\u00e1p quang \u0111a mode.<\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/476830.htm\" target=\"_self\"><strong>SMF 1310nm<\/strong><\/a><strong>:<\/strong> Suy hao th\u1ea5p h\u01a1n, th\u01b0\u1eddng kho\u1ea3ng ~0,35 dB\/km tr\u00ean c\u00e1p quang \u0111\u01a1n mode.<\/p><\/li>\n\n\n\n<li><p><strong>SMF 1550nm:<\/strong> C\u1eeda s\u1ed5 suy hao th\u1ea5p nh\u1ea5t, th\u01b0\u1eddng kho\u1ea3ng ~0,20\u20130,25 dB\/km tr\u00ean c\u00e1p quang \u0111\u01a1n mode.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec 1550 nm ch\u1ecbu suy hao s\u1ee3i n\u1ed9i t\u1ea1i th\u1ea5p nh\u1ea5t, n\u00ean n\u00f3 h\u1ed7 tr\u1ee3 kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn d\u00e0i nh\u1ea5t trong \u0111i\u1ec1u ki\u1ec7n c\u00f4ng su\u1ea5t t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">H\u00e0nh vi t\u00e1n s\u1eafc<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1n s\u1eafc khi\u1ebfn xung quang b\u1ecb gi\u00e3n ra khi di chuy\u1ec3n, l\u00e0m gi\u1edbi h\u1ea1n b\u0103ng th\u00f4ng s\u1eed d\u1ee5ng theo kho\u1ea3ng c\u00e1ch.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>T\u00e1n s\u1eafc mode<\/strong> ch\u1ee7 y\u1ebfu \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u1ec7 th\u1ed1ng \u0111a mode 850 nm, n\u01a1i nhi\u1ec1u \u0111\u01b0\u1eddng truy\u1ec1n g\u00e2y gi\u00e3n xung. \u0110\u00e2y l\u00e0 l\u00fd do v\u00ec sao c\u00e1c li\u00ean k\u1ebft 850 nm b\u1ecb gi\u1edbi h\u1ea1n kho\u1ea3ng c\u00e1ch trong m\u00f4i tr\u01b0\u1eddng trung t\u00e2m d\u1eef li\u1ec7u.<\/p><\/li>\n\n\n\n<li><p><strong>T\u00e1n s\u1eafc s\u1eafc m\u00e0u<\/strong> tr\u1edf n\u00ean quan tr\u1ecdng h\u01a1n tr\u00ean c\u00e1p quang \u0111\u01a1n mode \u1edf 1310 nm v\u00e0 1550 nm.<\/p>\n<ul class=\"wp-block-list\">\n<li><p>\u1ede kho\u1ea3ng 1310 nm, t\u00e1n s\u1eafc s\u1eafc m\u00e0u g\u1ea7n b\u1eb1ng kh\u00f4ng tr\u00ean c\u00e1p quang \u0111\u01a1n mode chu\u1ea9n.<\/p><\/li>\n\n\n\n<li><p>\u1ede 1550 nm, t\u00e1n s\u1eafc s\u1eafc m\u00e0u cao h\u01a1n nh\u01b0ng v\u1eabn c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c v\u1edbi thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng ph\u00f9 h\u1ee3p.<\/p><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1n s\u1eafc \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn kho\u1ea3ng c\u00e1ch \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1ed1i \u0111a v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed1c \u0111\u1ed9 cao (v\u00ed d\u1ee5: 10G, 25G ho\u1eb7c cao h\u01a1n).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t v\u00e0 d\u1ef1 tr\u1eef li\u00ean k\u1ebft<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc s\u00f3ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 thi c\u1ee7a li\u00ean k\u1ebft th\u00f4ng qua ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang. M\u1ed1i quan h\u1ec7 k\u1ef9 thu\u1eadt c\u1ed1t l\u00f5i l\u00e0:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>D\u1ef1 tr\u1eef kh\u1ea3 d\u1ee5ng = C\u00f4ng su\u1ea5t ph\u00e1t (t\u1ed1i thi\u1ec3u) \u2212 T\u1ed5ng t\u1ed5n th\u1ea5t li\u00ean k\u1ebft \u2212 C\u00f4ng su\u1ea5t nh\u1eadn (t\u1ed1i thi\u1ec3u)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec suy hao kh\u00e1c nhau theo b\u01b0\u1edbc s\u00f3ng, c\u00f9ng m\u1ed9t m\u1ee9c c\u00f4ng su\u1ea5t ph\u00e1t c\u00f3 th\u1ec3 t\u1ea1o ra kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a r\u1ea5t kh\u00e1c nhau. V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c h\u1ec7 th\u1ed1ng 850 nm ti\u00eau th\u1ee5 ng\u00e2n s\u00e1ch li\u00ean k\u1ebft nhanh do suy hao cao h\u01a1n v\u00e0 t\u00e1n s\u1eafc mode.<\/p><\/li>\n\n\n\n<li><p>C\u00e1c h\u1ec7 th\u1ed1ng 1550 nm duy tr\u00ec d\u1ef1 tr\u1eef quang t\u1ed1t h\u01a1n tr\u00ean c\u00e1c kho\u1ea3ng c\u00e1ch d\u00e0i.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 kh\u00f4ng kh\u1edbp gi\u1eefa b\u01b0\u1edbc s\u00f3ng v\u00e0 kho\u1ea3ng c\u00e1ch y\u00eau c\u1ea7u th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn d\u1ef1 tr\u1eef kh\u00f4ng \u0111\u1ee7 ho\u1eb7c ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn T\u1ef7 l\u1ec7 l\u1ed7i bit (BER)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Khi suy hao v\u00e0 t\u00e1n s\u1eafc t\u0103ng l\u00ean, \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u suy gi\u1ea3m. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gi\u1ea3m t\u1ef7 l\u1ec7 <a href=\"https:\/\/resources.l-p.com\/vi\/glossary\/snr-signal-to-noise-ratio-and-its-impact-on-signal-quality\/\" target=\"_blank\" rel=\"\">t\u00edn hi\u1ec7u tr\u00ean nhi\u1ec5u quang<\/a> (OSNR)<\/p><\/li>\n\n\n\n<li><p>\u0110\u00f3ng bi\u1ec3u \u0111\u1ed3 m\u1eaft<\/p><\/li>\n\n\n\n<li><p>T\u0103ng t\u1ef7 l\u1ec7 l\u1ed7i bit (BER)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/vi\/glossary\/fec-forward-error-correction-in-optical-communication\/\">s\u1eeda l\u1ed7i ti\u1ebfn<\/a> (FEC) c\u00f3 th\u1ec3 b\u00f9 \u0111\u1eafp c\u00e1c suy hao nh\u1ecf, nh\u01b0ng vi\u1ec7c l\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng v\u1eabn l\u00e0 y\u1ebfu t\u1ed1 n\u1ec1n t\u1ea3ng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t BER ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c m\u00e0 kh\u00f4ng c\u1ea7n qu\u00e1 nhi\u1ec1u chi ph\u00ed s\u1eeda l\u1ed7i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ed9 khu\u1ebfch \u0111\u1ea1i quang (EDFA t\u1ea1i 1550 nm)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng \u01b0u \u0111i\u1ec3m l\u1edbn c\u1ee7a truy\u1ec1n d\u1eabn \u1edf b\u01b0\u1edbc s\u00f3ng 1550 nm l\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ed9 khu\u1ebfch \u0111\u1ea1i s\u1ee3i quang pha t\u1ea1p Erbium (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/vi\/glossary\/erbium-doped-fiber-amplifier-optical-networks\/\">EDFA<\/a>). C\u00e1c b\u1ed9 khu\u1ebfch \u0111\u1ea1i EDFA ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 trong c\u1eeda s\u1ed5 1550 nm, cho ph\u00e9p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Truy\u1ec1n d\u1eabn \u0111\u01b0\u1eddng d\u00e0i<\/p><\/li>\n\n\n\n<li><p>c\u00e1c h\u1ec7 th\u1ed1ng DWDM<\/p><\/li>\n\n\n\n<li><p>M\u1edf r\u1ed9ng kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c tr\u1ea1m khu\u1ebfch \u0111\u1ea1i m\u00e0 kh\u00f4ng c\u1ea7n t\u00e1i t\u1ea1o \u0111i\u1ec7n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c khu\u1ebfch \u0111\u1ea1i kh\u00f4ng kh\u1ea3 thi \u1edf b\u01b0\u1edbc s\u00f3ng 850 nm v\u00e0 hi\u1ebfm khi \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u1edf b\u01b0\u1edbc s\u00f3ng 1310 nm, do \u0111\u00f3 1550 nm l\u00e0 b\u01b0\u1edbc s\u00f3ng \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng cho c\u00e1c m\u1ea1ng \u0111\u00f4 th\u1ecb v\u00e0 m\u1ea1ng l\u00f5i \u0111\u01b0\u1eddng d\u00e0i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u00f3m t\u1eaft k\u1ef9 thu\u1eadt<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc s\u00f3ng x\u00e1c \u0111\u1ecbnh qu\u00e3ng \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 truy\u1ec1n \u0111i, \u0111\u1ed9 r\u00f5 n\u00e9t khi t\u00edn hi\u1ec7u \u0111\u1ebfn \u0111\u00edch, v\u00e0 kh\u1ea3 n\u0103ng khu\u1ebfch \u0111\u1ea1i hay kh\u00f4ng. <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/vi\/knowledge-center\/attenuation-in-optical-transceiver-management-and-solutions\/\">M\u1ee9c suy hao<\/a>, t\u00e1n s\u1eafc, ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t, hi\u1ec7u su\u1ea5t BER v\u00e0 t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ed9 khu\u1ebfch \u0111\u1ea1i \u0111\u1ec1u l\u00e0 c\u00e1c y\u1ebfu t\u1ed1 ph\u1ee5 thu\u1ed9c v\u00e0o b\u01b0\u1edbc s\u00f3ng, c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 k\u1ef9 l\u01b0\u1ee1ng khi l\u1ef1a ch\u1ecdn b\u1ed9 thu ph\u00e1t quang.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u21aa\ufe0f&nbsp;<\/strong>\u1ee8ng d\u1ee5ng SFP 850 nm (\u0111a mode)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476059.htm\"><strong>\u0110a mode 850 nm<\/strong><\/a> <strong>SFP <\/strong>b\u1ed9 thu ph\u00e1t ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho truy\u1ec1n th\u00f4ng c\u1ef1 ly ng\u1eafn tr\u00ean s\u1ee3i quang \u0111a mode (MMF). N\u00f3 \u0111\u01b0\u1ee3c tri\u1ec3n khai r\u1ed9ng r\u00e3i trong trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 m\u1ea1ng doanh nghi\u1ec7p, n\u01a1i kho\u1ea3ng c\u00e1ch k\u1ebft n\u1ed1i b\u1ecb gi\u1edbi h\u1ea1n nh\u01b0ng m\u1eadt \u0111\u1ed9 c\u1ed5ng cao v\u00e0 hi\u1ec7u qu\u1ea3 chi ph\u00ed l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/60cc93afc66f4abd8cb1c7bb1d018317.jpg\" alt=\"850nm SFP (Multimode) Applications\" class=\"wp-image-3257\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/60cc93afc66f4abd8cb1c7bb1d018317.jpg 1200w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/60cc93afc66f4abd8cb1c7bb1d018317-300x169.jpg 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/60cc93afc66f4abd8cb1c7bb1d018317-1024x576.jpg 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/60cc93afc66f4abd8cb1c7bb1d018317-768x432.jpg 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/60cc93afc66f4abd8cb1c7bb1d018317-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00f4ng ngh\u1ec7 VCSEL<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea7n l\u1edbn module SFP 850 nm s\u1eed d\u1ee5ng <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/vi\/glossary\/overview-of-vcsel\/\"><strong>Laser VCSEL.<\/strong><\/a><strong> (Laser ph\u00e1t x\u1ea1 b\u1ec1 m\u1eb7t khoang d\u1ecdc)<\/strong> c\u00f4ng ngh\u1ec7. C\u00e1c laser VCSEL mang l\u1ea1i:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Chi ph\u00ed s\u1ea3n xu\u1ea5t th\u1ea5p<\/p><\/li>\n\n\n\n<li><p>Hi\u1ec7u su\u1ea5t \u0111i\u1ec1u ch\u1ebf cao<\/p><\/li>\n\n\n\n<li><p>Ti\u00eau th\u1ee5 c\u00f4ng su\u1ea5t th\u1ea5p<\/p><\/li>\n\n\n\n<li><p>Ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch ng\u1eafn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec ch\u00f9m ph\u00e1t x\u1ea1 t\u1eeb VCSEL gh\u00e9p n\u1ed1i hi\u1ec7u qu\u1ea3 v\u00e0o l\u00f5i s\u1ee3i quang \u0111a mode (50\/125 \u00b5m ho\u1eb7c 62.5\/125 \u00b5m), n\u00ean b\u01b0\u1edbc s\u00f3ng 850 nm \u0111\u00e3 tr\u1edf th\u00e0nh b\u01b0\u1edbc s\u00f3ng th\u1ed1ng tr\u1ecb cho c\u00e1c chu\u1ea9n Ethernet c\u1ef1 ly ng\u1eafn nh\u01b0 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong IEEE 802.3z v\u00e0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/vi\/knowledge-center\/what-is-ieee-802-3ae-10-gigabit-ethernet\/\">IEEE 802.3ae<\/a> (c\u00e1c bi\u1ebfn th\u1ec3 SR).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi s\u1ee3i OM3 \/ OM4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module SFP 850 nm \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho s\u1ee3i quang \u0111a mode \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho laser:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong><p>Up to 550 m (1,800 ft)<\/p><\/strong> (th\u01b0\u1eddng h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 10G l\u00ean \u0111\u1ebfn 300 m)<\/p><\/li>\n\n\n\n<li><p><strong>OM4<\/strong> (th\u01b0\u1eddng h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 10G l\u00ean \u0111\u1ebfn 400 m)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c lo\u1ea1i s\u1ee3i n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi d\u1ea3i th\u00f4ng ch\u1ebf \u0111\u1ed9 c\u1ea3i ti\u1ebfn nh\u1eb1m gi\u1ea3m \u0111\u1ed9 tr\u1ec5 ch\u1ebf \u0111\u1ed9 vi ph\u00e2n so v\u1edbi c\u00e1c lo\u1ea1i s\u1ee3i c\u0169 h\u01a1n nh\u01b0 OM1\/OM2. Hi\u1ec7u su\u1ea5t ph\u1ee5 thu\u1ed9c m\u1ea1nh v\u00e0o ch\u1ea5t l\u01b0\u1ee3ng s\u1ee3i v\u00e0 \u0111i\u1ec1u ki\u1ec7n l\u1eafp \u0111\u1eb7t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u1ea1m vi \u0111i\u1ec3n h\u00ecnh<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ef1 ly truy\u1ec1n d\u1eabn thay \u0111\u1ed5i t\u00f9y theo t\u1ed1c \u0111\u1ed9 Ethernet v\u00e0 c\u1ea5p \u0111\u1ed9 s\u1ee3i:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>1G (<a href=\"https:\/\/www.l-p.com\/products\/478230.htm\" target=\"_self\">C\u00e1c h\u1ea1n ch\u1ebf m\u00e3 h\u00f3a c\u1ee7a nh\u00e0 cung c\u1ea5p \u0111\u01b0\u1ee3c xem x\u00e9t n\u1ebfu s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb quang h\u1ecdc c\u1ee7a b\u00ean th\u1ee9 ba<\/a>): l\u00ean \u0111\u1ebfn ~550 m tr\u00ean s\u1ee3i MMF ch\u1ea5t l\u01b0\u1ee3ng cao<\/p><\/li>\n\n\n\n<li><p>10G (<a href=\"https:\/\/www.l-p.com\/products\/475415.htm\" target=\"_self\">10GBASE-SR<\/a>):<\/p>\n<ul class=\"wp-block-list\">\n<li><p>~300 m tr\u00ean OM3<\/p><\/li>\n\n\n\n<li><p>~400 m tr\u00ean OM4<\/p><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><p>T\u1ed1c \u0111\u1ed9 cao h\u01a1n (c\u00e1c bi\u1ebfn th\u1ec3 SR 25G\/40G): th\u01b0\u1eddng c\u00f3 c\u1ef1 ly ng\u1eafn h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9 l\u00e0 y\u1ebfu t\u1ed1 gi\u1edbi h\u1ea1n ch\u00ednh, ch\u1ee9 kh\u00f4ng ch\u1ec9 l\u00e0 suy hao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u1ee8ng d\u1ee5ng c\u1ef1 ly ng\u1eafn trong trung t\u00e2m d\u1eef li\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module SFP \u0111a mode 850 nm r\u1ea5t ph\u00f9 h\u1ee3p cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/resources.l-p.com\/vi\/knowledge-center\/what-is-a-tor-top-of-rack-switch\/\" target=\"_blank\" rel=\"\">Tr\u00ean c\u00f9ng m\u1ed9t rack<\/a> K\u1ebft n\u1ed1i t\u1eeb thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i (ToR) \u0111\u1ebfn switch t\u1ed5ng h\u1ee3p<\/p><\/li>\n\n\n\n<li><p>K\u1ebft n\u1ed1i gi\u1eefa m\u00e1y ch\u1ee7 v\u00e0 b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/p><\/li>\n\n\n\n<li><p>M\u1ea1ng l\u01b0\u1edbi trung t\u00e2m d\u1eef li\u1ec7u m\u1eadt \u0111\u1ed9 cao<\/p><\/li>\n\n\n\n<li><p>K\u1ebft n\u1ed1i x\u01b0\u01a1ng s\u1ed1ng n\u1ed9i b\u1ed9 t\u00f2a nh\u00e0 ng\u1eafn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u00fang c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn v\u00e0 h\u1ed7 tr\u1ee3 s\u1ed1 l\u01b0\u1ee3ng c\u1ed5ng l\u1edbn trong m\u00f4i tr\u01b0\u1eddng switch.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">L\u1ee3i th\u1ebf v\u1ec1 chi ph\u00ed<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">So v\u1edbi c\u00e1c gi\u1ea3i ph\u00e1p \u0111\u01a1n mode 1310 nm ho\u1eb7c 1550 nm:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Chi ph\u00ed b\u1ed9 thu ph\u00e1t th\u01b0\u1eddng th\u1ea5p h\u01a1n<\/p><\/li>\n\n\n\n<li><p>Vi\u1ec7c \u0111\u1ea5u n\u1ed1i s\u1ee3i quang \u0111a mode th\u01b0\u1eddng \u00edt t\u1ed1n k\u00e9m h\u01a1n trong c\u00e1c \u0111o\u1ea1n ng\u1eafn<\/p><\/li>\n\n\n\n<li><p>S\u1ea3n xu\u1ea5t VCSEL hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed h\u01a1n so v\u1edbi s\u1ea3n xu\u1ea5t laser DFB<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y khi\u1ebfn 850 nm tr\u1edf th\u00e0nh gi\u1ea3i ph\u00e1p kinh t\u1ebf cho c\u00e1c tri\u1ec3n khai c\u1ef1 ly ng\u1eafn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">H\u1ea1n ch\u1ebf<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m, nh\u01b0ng <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476067.htm\">SFP \u0111a mode 850 nm<\/a> v\u1eabn c\u00f3 nh\u1eefng h\u1ea1n ch\u1ebf:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a b\u1ecb gi\u1edbi h\u1ea1n do t\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c k\u1ebft n\u1ed1i khu\u00f4n vi\u00ean ho\u1eb7c \u0111\u00f4 th\u1ecb<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ed9 khu\u1ebfch \u0111\u1ea1i quang<\/p><\/li>\n\n\n\n<li><p>Su\u1ea5t suy hao cao h\u01a1n so v\u1edbi c\u00e1c c\u1eeda s\u1ed5 truy\u1ec1n d\u1eabn tr\u00ean s\u1ee3i \u0111\u01a1n mode<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi kho\u1ea3ng c\u00e1ch v\u01b0\u1ee3t v\u00e0i tr\u0103m m\u00e9t, c\u00e1c gi\u1ea3i ph\u00e1p \u0111\u01a1n mode 1310 nm ho\u1eb7c 1550 nm th\u01b0\u1eddng l\u00e0 b\u1eaft bu\u1ed9c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>K\u1ebft lu\u1eadn k\u1ef9 thu\u1eadt:<\/strong><br>C\u00e1c module SFP \u0111a mode 850 nm \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho c\u00e1c m\u00f4i tr\u01b0\u1eddng c\u1ef1 ly ng\u1eafn, m\u1eadt \u0111\u1ed9 cao v\u00e0 nh\u1ea1y c\u1ea3m v\u1ec1 chi ph\u00ed\u2014\u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/vi\/knowledge-center\/what-is-a-data-center\/\">trung t\u00e2m d\u1eef li\u1ec7u<br><\/a>hi\u1ec7n \u0111\u1ea1i\u2014nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho truy\u1ec1n d\u1eabn c\u1ef1 ly xa ho\u1eb7c tr\u00ean m\u1ea1ng l\u00f5i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u21aa\ufe0f&nbsp;<\/strong>\u1ee8ng d\u1ee5ng SFP 1310 nm (\u0111\u01a1n mode)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>1310nm <\/strong><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476092.htm\"><strong>SFP \u0111\u01a1n mode<\/strong><\/a> b\u1ed9 thu ph\u00e1t \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 truy\u1ec1n d\u1eabn tr\u00ean s\u1ee3i quang \u0111\u01a1n mode (SMF) v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong m\u1ea1ng khu\u00f4n vi\u00ean, m\u1ea1ng l\u00f5i doanh nghi\u1ec7p v\u00e0 m\u1ea1ng truy nh\u1eadp \u0111\u00f4 th\u1ecb. Gi\u1ea3i ph\u00e1p n\u00e0y mang l\u1ea1i s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa suy hao v\u1eeba ph\u1ea3i, t\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9 t\u1ed1i thi\u1ec3u v\u00e0 ph\u1ea1m vi truy\u1ec1n d\u1eabn th\u1ef1c t\u1ebf cho c\u00e1c tri\u1ec3n khai c\u1ef1 ly trung b\u00ecnh.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/012790bbdb1f47908e3b5aa1b5bb2788.jpg\" alt=\"1310nm SFP (Single-Mode) Applications\" class=\"wp-image-3258\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/012790bbdb1f47908e3b5aa1b5bb2788.jpg 1200w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/012790bbdb1f47908e3b5aa1b5bb2788-300x169.jpg 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/012790bbdb1f47908e3b5aa1b5bb2788-1024x576.jpg 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/012790bbdb1f47908e3b5aa1b5bb2788-768x432.jpg 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/012790bbdb1f47908e3b5aa1b5bb2788-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Truy\u1ec1n d\u1eabn tr\u00ean s\u1ee3i quang \u0111\u01a1n mode (SMF)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">1310 nm <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/488475.htm\">SFP modules<\/a> ho\u1ea1t \u0111\u1ed9ng tr\u00ean s\u1ee3i quang \u0111\u01a1n mode ti\u00eau chu\u1ea9n 9\/125 \u00b5m. Kh\u00e1c v\u1edbi h\u1ec7 th\u1ed1ng \u0111a mode, s\u1ee3i quang \u0111\u01a1n mode ch\u1ec9 h\u1ed7 tr\u1ee3 m\u1ed9t ch\u1ebf \u0111\u1ed9 lan truy\u1ec1n, nh\u1edd \u0111\u00f3 lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n t\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9 v\u00e0 cho ph\u00e9p truy\u1ec1n d\u1eabn \u1edf kho\u1ea3ng c\u00e1ch d\u00e0i h\u01a1n \u0111\u00e1ng k\u1ec3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c tri\u1ec3n khai Ethernet ph\u1ed5 bi\u1ebfn \u1edf b\u01b0\u1edbc s\u00f3ng 1310 nm \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong IEEE 802.3z (1000BASE-LX) v\u00e0 IEEE 802.3ae (<a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475586.htm\">10GBASE-LR<\/a>).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u1ea1m vi truy\u1ec1n d\u1eabn \u0111i\u1ec3n h\u00ecnh: t\u1eeb 10 km \u0111\u1ebfn 20 km<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module SFP \u0111\u01a1n mode 1310 nm th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1eb7c t\u1ea3 cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>10 km<\/strong> (l\u1edbp LR ti\u00eau chu\u1ea9n)<\/p><\/li>\n\n\n\n<li><p><strong>20 km<\/strong> (c\u00e1c bi\u1ebfn th\u1ec3 c\u1ef1 ly m\u1edf r\u1ed9ng, t\u00f9y thu\u1ed9c v\u00e0o ng\u00e2n s\u00e1ch quang h\u1ecdc)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea1m vi th\u1ef1c t\u1ebf ph\u1ee5 thu\u1ed9c v\u00e0o c\u00f4ng su\u1ea5t ph\u00e1t ra c\u1ee7a b\u1ed9 ph\u00e1t, \u0111\u1ed9 nh\u1ea1y c\u1ee7a b\u1ed9 thu, t\u1ed5ng t\u1ed5n hao \u0111\u01b0\u1eddng truy\u1ec1n v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ea7u n\u1ed1i\/n\u1ed1i s\u1ee3i. V\u1edbi vi\u1ec7c l\u1eadp ng\u00e2n s\u00e1ch \u0111\u01b0\u1eddng truy\u1ec1n \u0111\u00fang c\u00e1ch, hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh \u1edf c\u00e1c kho\u1ea3ng c\u00e1ch n\u00e0y c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u00e0 kh\u00f4ng c\u1ea7n khu\u1ebfch \u0111\u1ea1i quang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Tri\u1ec3n khai \u0111\u00f4 th\u1ecb v\u00e0 khu\u00f4n vi\u00ean<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module SFP 1310 nm th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u1ebft n\u1ed1i x\u01b0\u01a1ng s\u1ed1ng khu\u00f4n vi\u00ean gi\u1eefa c\u00e1c t\u00f2a nh\u00e0<\/p><\/li>\n\n\n\n<li><p>C\u00e1c l\u1edbp t\u1ed5ng h\u1ee3p doanh nghi\u1ec7p<\/p><\/li>\n\n\n\n<li><p>C\u00e1c v\u00f2ng truy c\u1eadp \u0111\u00f4 th\u1ecb<\/p><\/li>\n\n\n\n<li><p>K\u1ebft n\u1ed1i t\u1eeb n\u00fat bi\u00ean ISP \u0111\u1ebfn n\u00fat truy nh\u1eadp<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u00fang cung c\u1ea5p kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eabn \u0111\u1ee7 xa m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ed9 ph\u1ee9c t\u1ea1p ho\u1eb7c chi ph\u00ed c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng 1550 nm \u0111\u01b0\u1eddng d\u00e0i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9 th\u1ea5p h\u01a1n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Do truy\u1ec1n d\u1eabn di\u1ec5n ra tr\u00ean s\u1ee3i quang \u0111\u01a1n mode, t\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf hi\u1ec7u qu\u1ea3. Ngo\u00e0i ra, t\u00e1n s\u1eafc s\u1eafc m\u00e0u g\u1ea7n \u0111i\u1ec3m t\u00e1n s\u1eafc b\u1eb1ng kh\u00f4ng quanh b\u01b0\u1edbc s\u00f3ng 1310 nm tr\u00ean s\u1ee3i SMF ti\u00eau chu\u1ea9n, gi\u00fap duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u \u1edf kho\u1ea3ng c\u00e1ch trung b\u00ecnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1eb7c t\u00ednh t\u00e1n s\u1eafc n\u00e0y l\u00e0m cho b\u01b0\u1edbc s\u00f3ng 1310 nm \u0111\u1eb7c bi\u1ec7t \u1ed5n \u0111\u1ecbnh \u0111\u1ed1i v\u1edbi t\u1ed1c \u0111\u1ed9 Ethernet 1G v\u00e0 10G m\u00e0 kh\u00f4ng c\u1ea7n b\u00f9 t\u00e1n s\u1eafc n\u00e2ng cao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ed9 suy hao v\u1eeba ph\u1ea3i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 suy hao s\u1ee3i quang t\u1ea1i b\u01b0\u1edbc s\u00f3ng 1310 nm th\u01b0\u1eddng v\u00e0o kho\u1ea3ng <strong>0,35 dB\/km<\/strong> trong s\u1ee3i quang \u0111\u01a1n mode ti\u00eau chu\u1ea9n. M\u1eb7c d\u00f9 cao h\u01a1n c\u1eeda s\u1ed5 1550 nm, gi\u00e1 tr\u1ecb n\u00e0y v\u1eabn \u0111\u1ee7 th\u1ea5p \u0111\u1ec3 h\u1ed7 tr\u1ee3 c\u00e1c li\u00ean k\u1ebft d\u00e0i v\u00e0i kil\u00f4m\u00e9t v\u1edbi bi\u00ean d\u1ef1 tr\u1eef quang h\u1ecdc \u0111\u1ea7y \u0111\u1ee7.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1edd s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa \u0111\u1ed9 suy hao v\u00e0 hi\u1ec7u n\u0103ng t\u00e1n s\u1eafc n\u00e0y, b\u01b0\u1edbc s\u00f3ng 1310 nm th\u01b0\u1eddng \u0111\u01b0\u1ee3c xem l\u00e0 l\u1ef1a ch\u1ecdn m\u1eb7c \u0111\u1ecbnh cho c\u00e1c tri\u1ec3n khai \u0111\u01a1n mode \u1edf kho\u1ea3ng c\u00e1ch trung b\u00ecnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>K\u1ebft lu\u1eadn k\u1ef9 thu\u1eadt:<\/strong><br>C\u00e1c module SFP \u0111\u01a1n mode 1310nm cung c\u1ea5p gi\u1ea3i ph\u00e1p th\u1ef1c ti\u1ec5n v\u00e0 \u0111\u00e1ng tin c\u1eady cho truy\u1ec1n d\u1eabn t\u1eeb 10\u201320 km trong m\u00f4i tr\u01b0\u1eddng khu\u00f4n vi\u00ean v\u00e0 \u0111\u00f4 th\u1ecb, v\u1edbi \u0111\u1ed9 t\u00e1n s\u1eafc th\u1ea5p, \u0111\u1ed9 suy hao d\u1ec5 ki\u1ec3m so\u00e1t v\u00e0 vi\u1ec7c t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft \u0111\u01a1n gi\u1ea3n, kh\u00f4ng c\u1ea7n khu\u1ebfch \u0111\u1ea1i quang.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u21aa\ufe0f&nbsp;<\/strong>SFP 1550nm cho \u1ee9ng d\u1ee5ng \u0111\u01b0\u1eddng d\u00e0i v\u00e0 DWDM<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>SFP 1550nm <\/strong><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476873.htm\"><strong>kho\u1ea3ng c\u00e1ch xa<\/strong> transceiver<\/a> \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea7m xa m\u1edf r\u1ed9ng tr\u00ean s\u1ee3i quang \u0111\u01a1n mode (SMF), n\u01a1i \u0111\u1ed9 suy hao th\u1ea5p v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi khu\u1ebfch \u0111\u1ea1i quang l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu. N\u00f3 \u0111\u01b0\u1ee3c tri\u1ec3n khai r\u1ed9ng r\u00e3i trong c\u00e1c m\u1ea1ng \u0111\u00f4 th\u1ecb, \u0111\u01b0\u1eddng d\u00e0i v\u00e0 DWDM \u0111\u00f2i h\u1ecfi kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a v\u00e0 m\u1eadt \u0111\u1ed9 k\u00eanh cao.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/67fb95f6ccf44633912c9e30077e53a3.jpg\" alt=\"1550nm SFP for Long-Haul and DWDM\" class=\"wp-image-3259\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/67fb95f6ccf44633912c9e30077e53a3.jpg 1200w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/67fb95f6ccf44633912c9e30077e53a3-300x169.jpg 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/67fb95f6ccf44633912c9e30077e53a3-1024x576.jpg 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/67fb95f6ccf44633912c9e30077e53a3-768x432.jpg 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/67fb95f6ccf44633912c9e30077e53a3-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ed9 suy hao s\u1ee3i quang th\u1ea5p nh\u1ea5t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc s\u00f3ng 1550 nm ho\u1ea1t \u0111\u1ed9ng trong c\u1eeda s\u1ed5 t\u1ed5n hao th\u1ea5p c\u1ee7a SMF, v\u1edbi \u0111\u1ed9 suy hao \u0111i\u1ec3n h\u00ecnh v\u00e0o kho\u1ea3ng <strong>0,20\u20130,25 dB\/km<\/strong>, th\u1ea5p \u0111\u00e1ng k\u1ec3 so v\u1edbi h\u1ec7 th\u1ed1ng \u0111a mode 850 nm ho\u1eb7c \u0111\u01a1n mode 1310 nm. T\u00ednh ch\u1ea5t n\u00e0y cho ph\u00e9p t\u00edn hi\u1ec7u quang truy\u1ec1n \u0111i xa h\u01a1n tr\u01b0\u1edbc khi c\u1ea7n khu\u1ebfch \u0111\u1ea1i ho\u1eb7c t\u00e1i t\u1ea1o.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ea7m xa nh\u1ea5t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1edd \u0111\u1ed9 suy hao gi\u1ea3m v\u00e0 \u0111\u1ed9 t\u00e1n s\u1eafc d\u1ec5 ki\u1ec3m so\u00e1t, c\u00e1c module SFP 1550 nm h\u1ed7 tr\u1ee3 c\u00e1c li\u00ean k\u1ebft \u0111\u01a1n mode th\u1ef1c t\u1ebf d\u00e0i nh\u1ea5t m\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed trung gian. C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c li\u00ean k\u1ebft x\u01b0\u01a1ng s\u1ed1ng \u0111\u01b0\u1eddng d\u00e0i tr\u1ea3i d\u00e0i t\u1eeb v\u00e0i ch\u1ee5c \u0111\u1ebfn h\u00e0ng tr\u0103m kil\u00f4m\u00e9t<\/p><\/li>\n\n\n\n<li><p>T\u1eadp h\u1ee3p v\u00f2ng \u0111\u00f4 th\u1ecb gi\u1eefa c\u00e1c \u0111\u1ecba \u0111i\u1ec3m c\u00e1ch xa nhau<\/p><\/li>\n\n\n\n<li><p>M\u1ea1ng bi\u1ec3n s\u00e2u v\u00e0 li\u00ean th\u00e0nh ph\u1ed1 (khi k\u1ebft h\u1ee3p v\u1edbi b\u1ed9 khu\u1ebfch \u0111\u1ea1i s\u1ee3i pha t\u1ea1p Erbium \u2013 EDFA)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea7m xa b\u1ecb gi\u1edbi h\u1ea1n ch\u1ee7 y\u1ebfu b\u1edfi c\u00f4ng su\u1ea5t b\u1ed9 ph\u00e1t, \u0111\u1ed9 nh\u1ea1y b\u1ed9 thu v\u00e0 t\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft do n\u1ed1i h\u00e0n, \u0111\u1ea7u n\u1ed1i v\u00e0 \u0111\u1ed9 suy hao s\u1ee3i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u01b0\u01a1ng th\u00edch v\u1edbi EDFA<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng l\u1ee3i th\u1ebf l\u1edbn nh\u1ea5t c\u1ee7a b\u01b0\u1edbc s\u00f3ng 1550 nm l\u00e0 <strong>kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ed9 khu\u1ebfch \u0111\u1ea1i s\u1ee3i pha t\u1ea1p Erbium (EDFA)<\/strong>. C\u00e1c b\u1ed9 EDFA khu\u1ebfch \u0111\u1ea1i hi\u1ec7u qu\u1ea3 t\u00edn hi\u1ec7u quang trong c\u1eeda s\u1ed5 1550 nm m\u00e0 kh\u00f4ng c\u1ea7n chuy\u1ec3n \u0111\u1ed5i sang t\u00edn hi\u1ec7u \u0111i\u1ec7n, cho ph\u00e9p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Truy\u1ec1n d\u1eabn \u0111\u01b0\u1eddng d\u00e0i m\u1edf r\u1ed9ng<\/p><\/li>\n\n\n\n<li><p>H\u1ec7 th\u1ed1ng ph\u00e2n chia b\u01b0\u1edbc s\u00f3ng m\u1eadt \u0111\u1ed9 cao (<a href=\"https:\/\/resources.l-p.com\/vi\/glossary\/what-is-dwdm-explaining-dense-wavelength-division-multiplexing\/\" target=\"_blank\" rel=\"\">DWDM<\/a>) tr\u00ean m\u1ed9t s\u1ee3i quang duy nh\u1ea5t<\/p><\/li>\n\n\n\n<li><p>Gi\u1ea3m nhu c\u1ea7u v\u1ec1 b\u1ed9 l\u1eb7p trung gian ho\u1eb7c \u0111i\u1ec3m t\u00e1i t\u1ea1o<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi EDFA khi\u1ebfn b\u01b0\u1edbc s\u00f3ng 1550 nm tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho c\u00e1c m\u1ea1ng x\u01b0\u01a1ng s\u1ed1ng v\u00e0 \u0111\u00f4 th\u1ecb c\u00f3 dung l\u01b0\u1ee3ng cao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kh\u00e1i ni\u1ec7m l\u01b0\u1edbi k\u00eanh DWDM<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c h\u1ec7 th\u1ed1ng gh\u00e9p k\u00eanh ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng m\u1eadt \u0111\u1ed9 cao (DWDM), nhi\u1ec1u k\u00eanh \u0111\u01b0\u1ee3c truy\u1ec1n \u0111\u1ed3ng th\u1eddi tr\u00ean m\u1ed9t s\u1ee3i quang b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c b\u01b0\u1edbc s\u00f3ng con ch\u00ednh x\u00e1c trong d\u1ea3i 1550 nm. C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n l\u01b0u \u00fd bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kho\u1ea3ng c\u00e1ch k\u00eanh (v\u00ed d\u1ee5: 50 GHz, 100 GHz)<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 dung sai b\u01b0\u1edbc s\u00f3ng<\/p><\/li>\n\n\n\n<li><p>S\u1ef1 c\u0103n ch\u1ec9nh v\u1edbi b\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh c\u1ee7a b\u1ed9 thu ph\u00e1t<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module SFP 1550 nm c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng theo c\u1eb7p trong h\u1ec7 th\u1ed1ng DWDM khi b\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh kh\u1edbp v\u1edbi l\u01b0\u1edbi k\u00eanh \u0111\u00e3 \u0111\u1ecbnh ngh\u0129a.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Quang h\u1ecdc chi ph\u00ed cao h\u01a1n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SFP 1550 nm th\u01b0\u1eddng \u0111\u1eaft h\u01a1n c\u00e1c module \u0111a mode 850 nm ho\u1eb7c \u0111\u01a1n mode 1310 nm do:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Laser \u0111\u1ed9 ch\u00ednh x\u00e1c cao h\u01a1n<\/p><\/li>\n\n\n\n<li><p>Y\u00eau c\u1ea7u \u1ed5n \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9<\/p><\/li>\n\n\n\n<li><p>Kh\u1ea3 n\u0103ng t\u00edch h\u1ee3p b\u1ed9 khu\u1ebfch \u0111\u1ea1i quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 chi ph\u00ed cao h\u01a1n, ch\u00fang cung c\u1ea5p hi\u1ec7u n\u0103ng \u0111\u01b0\u1eddng d\u00e0i thi\u1ebft y\u1ebfu v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch DWDM cho c\u00e1c m\u1ea1ng doanh nghi\u1ec7p, \u0111\u00f4 th\u1ecb v\u00e0 c\u1ea5p nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>K\u1ebft lu\u1eadn k\u1ef9 thu\u1eadt:<\/strong><br>C\u00e1c module SFP kho\u1ea3ng c\u00e1ch xa 1550nm l\u00e0 l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean cho c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u \u0111\u1ed9 suy hao t\u1ed1i thi\u1ec3u, kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i t\u1ea7m xa v\u00e0 t\u01b0\u01a1ng th\u00edch v\u1edbi EDFA\/DWDM. D\u00f9 \u0111\u1eaft h\u01a1n, t\u1ea7m xa m\u1edf r\u1ed9ng v\u00e0 kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 khu\u1ebfch \u0111\u1ea1i khi\u1ebfn ch\u00fang tr\u1edf n\u00ean thi\u1ebft y\u1ebfu cho c\u00e1c tri\u1ec3n khai x\u01b0\u01a1ng s\u1ed1ng v\u00e0 \u0111\u00f4 th\u1ecb c\u00f3 dung l\u01b0\u1ee3ng cao.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u21aa\ufe0f&nbsp;<\/strong>C\u00e1ch ch\u1ecdn b\u01b0\u1edbc s\u00f3ng SFP ph\u00f9 h\u1ee3p<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng SFP th\u00edch h\u1ee3p l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng li\u00ean k\u1ebft quang \u0111\u00e1ng tin c\u1eady. M\u1ed9t quy tr\u00ecnh ra quy\u1ebft \u0111\u1ecbnh h\u1ec7 th\u1ed1ng gi\u00fap \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch, bi\u00ean d\u1ef1 tr\u1eef quang h\u1ecdc \u0111\u1ea7y \u0111\u1ee7 v\u00e0 truy\u1ec1n d\u1eef li\u1ec7u \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/8ec82e960bc947d6852ba1da9941f572.jpg\" alt=\"850nm vs. 1310nm vs. 1550nm SFP\" class=\"wp-image-3260\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/8ec82e960bc947d6852ba1da9941f572.jpg 1200w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/8ec82e960bc947d6852ba1da9941f572-300x169.jpg 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/8ec82e960bc947d6852ba1da9941f572-1024x576.jpg 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/8ec82e960bc947d6852ba1da9941f572-768x432.jpg 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/8ec82e960bc947d6852ba1da9941f572-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">So s\u00e1nh 850nm vs. 1310nm vs. 1550nm (B\u1ea3ng so s\u00e1nh)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y cung c\u1ea5p b\u1ea3ng so s\u00e1nh k\u1ef9 thu\u1eadt ng\u1eafn g\u1ecdn v\u1ec1 ba b\u01b0\u1edbc s\u00f3ng SFP ph\u1ed5 bi\u1ebfn nh\u1ea5t, n\u00eau b\u1eadt kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi s\u1ee3i quang, t\u1ea7m xa \u0111i\u1ec3n h\u00ecnh, \u0111\u1ed9 suy hao, h\u00e0nh vi t\u00e1n s\u1eafc v\u00e0 c\u00e1c k\u1ecbch b\u1ea3n tri\u1ec3n khai \u0111i\u1ec3n h\u00ecnh.<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Parameter<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>850nm<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478919.htm\">1310nm<\/a><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/488431.htm\">1550 nm<\/a><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Lo\u1ea1i s\u1ee3i<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1ee3i quang \u0111a mode (OM3 \/ OM4)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p quang \u0111\u01a1n mode (SMF)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p quang \u0111\u01a1n mode (SMF)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Ph\u1ea1m vi \u0111i\u1ec3n h\u00ecnh<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>100\u2013400 m (SR)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10\u201320 km (LR)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>40\u2013120+ km (ER\/ZR v\u1edbi EDFA)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u0110\u1ed9 suy hao (dB\/km)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~2\u20133 dB\/km<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~0,35 dB\/km<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~0,20\u20130,25 dB\/km<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Lo\u1ea1i t\u00e1n s\u1eafc<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9 chi\u1ebfm \u01b0u th\u1ebf<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u00e1n s\u1eafc s\u1eafc m\u00e0u g\u1ea7n b\u1eb1ng kh\u00f4ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u00e1n s\u1eafc s\u1eafc m\u00e0u t\u0103ng d\u1ea7n theo kho\u1ea3ng c\u00e1ch<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Use Case<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Li\u00ean k\u1ebft ng\u1eafn trong trung t\u00e2m d\u1eef li\u1ec7u<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Li\u00ean k\u1ebft trung b\u00ecnh trong khu\u00f4n vi\u00ean ho\u1eb7c \u0111\u00f4 th\u1ecb<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u1ea1ng x\u01b0\u01a1ng s\u1ed1ng, DWDM v\u00e0 \u0111\u01b0\u1eddng d\u00e0i<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ed9 khu\u1ebfch \u0111\u1ea1i<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>No<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>H\u1ea1n ch\u1ebf \/ hi\u1ebfm g\u1eb7p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u01b0\u01a1ng th\u00edch v\u1edbi EDFA<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ghi ch\u00fa:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>850nm c\u00f3 chi ph\u00ed hi\u1ec7u qu\u1ea3 cho kho\u1ea3ng c\u00e1ch ng\u1eafn nh\u01b0ng b\u1ecb gi\u1edbi h\u1ea1n b\u1edfi t\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9.<\/p><\/li>\n\n\n\n<li><p>1310nm l\u00e0 ti\u00eau chu\u1ea9n cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u01a1n mode \u1edf kho\u1ea3ng c\u00e1ch trung b\u00ecnh v\u1edbi hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u1ed9 suy hao v\u1eeba ph\u1ea3i.<\/p><\/li>\n\n\n\n<li><p>1550nm cho ph\u00e9p kho\u1ea3ng c\u00e1ch xa nh\u1ea5t v\u00e0 ph\u00e2n k\u00eanh DWDM, nh\u01b0ng quang h\u1ecdc c\u00f3 chi ph\u00ed cao h\u01a1n.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea3ng so s\u00e1nh n\u00e0y ph\u1ee5c v\u1ee5 nh\u01b0 t\u00e0i li\u1ec7u tham kh\u1ea3o th\u1ef1c ti\u1ec5n cho k\u1ef9 s\u01b0 \u0111\u00e1nh gi\u00e1 <strong>vi\u1ec7c l\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng SFP<\/strong> d\u1ef1a tr\u00ean lo\u1ea1i s\u1ee3i, kho\u1ea3ng c\u00e1ch v\u00e0 \u1ee9ng d\u1ee5ng m\u1ea1ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">X\u00e1c \u0111\u1ecbnh lo\u1ea1i s\u1ee3i quang<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c \u0111\u1ecbnh xem li\u00ean k\u1ebft s\u1eed d\u1ee5ng <strong>s\u1ee3i quang \u0111a mode (MMF)<\/strong> or <strong>v\u00e0 s\u1ee3i quang \u0111\u01a1n mode (SMF)<\/strong>.<\/p><\/li>\n\n\n\n<li><p><strong>850 nm<\/strong> th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng cho s\u1ee3i \u0111a mode (MMF), trong khi <strong>1310 nm v\u00e0 1550 nm<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho s\u1ee3i \u0111\u01a1n mode (SMF).<\/p><\/li>\n\n\n\n<li><p>S\u1ef1 kh\u00f4ng kh\u1edbp gi\u1eefa b\u01b0\u1edbc s\u00f3ng v\u00e0 lo\u1ea1i c\u00e1p quang l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y l\u1ed7i li\u00ean k\u1ebft.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110o kho\u1ea3ng c\u00e1ch li\u00ean k\u1ebft<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00ednh kho\u1ea3ng c\u00e1ch v\u1eadt l\u00fd gi\u1eefa b\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu.<\/p><\/li>\n\n\n\n<li><p>Bao g\u1ed3m c\u00e1c b\u1ea3ng \u0111\u1ea5u n\u1ed1i (patch panel), \u0111\u1ea7u n\u1ed1i (connector) v\u00e0 m\u1ecdi thay \u0111\u1ed5i trong \u0111\u01b0\u1eddng \u0111i c\u1ee7a c\u00e1p quang.<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea3m b\u1ea3o kho\u1ea3ng c\u00e1ch n\u1eb1m trong ph\u1ea1m vi t\u1ed1i \u0111a cho b\u01b0\u1edbc s\u00f3ng \u0111\u00e3 ch\u1ecdn (v\u00ed d\u1ee5: 850 nm l\u00ean \u0111\u1ebfn 400 m tr\u00ean c\u00e1p OM4, 1310 nm l\u00ean \u0111\u1ebfn 20 km, 1550 nm l\u00ean \u0111\u1ebfn 120+ km v\u1edbi khu\u1ebfch \u0111\u1ea1i).<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">T\u00ednh t\u1ed5n hao li\u00ean k\u1ebft<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u01af\u1edbc t\u00ednh t\u1ed5ng t\u1ed5n hao quang b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng:<\/p><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>T\u1ed5ng t\u1ed5n hao (dB) = T\u1ed5n hao c\u00e1p + T\u1ed5n hao \u0111\u1ea7u n\u1ed1i + T\u1ed5n hao m\u1ed1i n\u1ed1i<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>So s\u00e1nh t\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft v\u1edbi <strong>c\u00f4ng su\u1ea5t ph\u00e1t ra (Tx output power) v\u00e0 \u0111\u1ed9 nh\u1ea1y b\u1ed9 thu (receiver sensitivity) c\u1ee7a b\u1ed9 thu ph\u00e1t<\/strong> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00f3 bi\u00ean d\u1ef1 ph\u00f2ng \u0111\u1ee7.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">V\u00ed d\u1ee5 t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>link budget<\/strong> x\u00e1c \u0111\u1ecbnh xem m\u1ed9t k\u1ebft n\u1ed1i quang c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh tr\u00ean m\u1ed9t kho\u1ea3ng c\u00e1ch nh\u1ea5t \u0111\u1ecbnh hay kh\u00f4ng. C\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n \u0111\u1ec3 t\u00ednh bi\u00ean d\u1ef1 ph\u00f2ng li\u00ean k\u1ebft l\u00e0:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Bi\u00ean d\u1ef1 ph\u00f2ng kh\u1ea3 d\u1ee5ng (dB) = Tx(min) \u2212 T\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft \u2212 Rx(min)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Trong \u0111\u00f3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Tx(min)<\/strong> = C\u00f4ng su\u1ea5t ph\u00e1t t\u1ed1i thi\u1ec3u (dBm)<\/p><\/li>\n\n\n\n<li><p><strong>T\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft<\/strong> = T\u1ed5ng t\u1ed5n hao c\u00e1p, \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i n\u1ed1i (dB)<\/p><\/li>\n\n\n\n<li><p><strong>Rx(min)<\/strong> = \u0110\u1ed9 nh\u1ea1y b\u1ed9 thu (c\u00f4ng su\u1ea5t nh\u1ecf nh\u1ea5t c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n, dBm)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>V\u00ed d\u1ee5 t\u00ednh to\u00e1n<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3 s\u1eed c\u00e1c gi\u00e1 tr\u1ecb sau <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476076.htm\">10G-SR<\/a> tr\u00ean c\u00e1p \u0111a mode OM4:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Parameter<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Value<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Tx(min)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>-3 dBm<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed5n hao s\u1ee3i quang<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>5 dB\/km \u00d7 150 m = 0.075 dB<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed5n hao do \u0111\u1ea7u n\u1ed1i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>4 \u0111\u1ea7u n\u1ed1i \u00d7 0.5 dB = 2.0 dB<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed5n hao do m\u1ed1i n\u1ed1i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>2 m\u1ed1i n\u1ed1i \u00d7 0.1 dB = 0.2 dB<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Rx(min)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>-11 dBm<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 1: T\u00ednh t\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>T\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft = 0.075 + 2.0 + 0.2 = 2.275 dB<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 2: T\u00ednh bi\u00ean d\u1ef1 ph\u00f2ng kh\u1ea3 d\u1ee5ng<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Bi\u00ean d\u1ef1 ph\u00f2ng kh\u1ea3 d\u1ee5ng = \u22123 \u2212 2.275 \u2212 (\u221211) = 5.725 dB<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Di\u1ec5n gi\u1ea3i<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>The <strong>bi\u00ean d\u1ef1 ph\u00f2ng kh\u1ea3 d\u1ee5ng 5.7 dB<\/strong> cho th\u1ea5y li\u00ean k\u1ebft c\u00f3 ng\u00e2n s\u00e1ch quang \u0111\u1ee7 \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh.<\/p><\/li>\n\n\n\n<li><p>Bi\u00ean d\u1ef1 ph\u00f2ng &gt; 3 dB th\u01b0\u1eddng \u0111\u01b0\u1ee3c coi l\u00e0 an to\u00e0n cho c\u00e1c li\u00ean k\u1ebft \u0111a mode SFP ng\u1eafn ph\u1ed5 bi\u1ebfn \u1edf b\u01b0\u1edbc s\u00f3ng 850 nm.<\/p><\/li>\n\n\n\n<li><p>N\u1ebfu bi\u00ean d\u1ef1 ph\u00f2ng gi\u1ea3m d\u01b0\u1edbi m\u1ee9c khuy\u1ebfn ngh\u1ecb, c\u00e1c l\u1ef1a ch\u1ecdn bao g\u1ed3m: r\u00fat ng\u1eafn chi\u1ec1u d\u00e0i c\u00e1p, s\u1eed d\u1ee5ng \u0111\u1ea7u n\u1ed1i t\u1ed1t h\u01a1n, d\u00f9ng SFP c\u00f3 c\u00f4ng su\u1ea5t ph\u00e1t cao h\u01a1n ho\u1eb7c chuy\u1ec3n sang lo\u1ea1i c\u00e1p c\u00f3 t\u1ed5n hao th\u1ea5p h\u01a1n.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">X\u00e1c nh\u1eadn \u0111\u1ed9 nh\u1ea1y b\u1ed9 thu<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ki\u1ec3m tra xem b\u1ed9 thu \u1edf \u0111\u1ea7u xa c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c b\u01b0\u1edbc s\u00f3ng \u0111\u00e3 ch\u1ecdn v\u1edbi bi\u00ean d\u1ef1 ph\u00f2ng c\u00f4ng su\u1ea5t \u0111\u1ee7 hay kh\u00f4ng.<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea3m b\u1ea3o m\u1ee9c c\u00f4ng su\u1ea5t n\u1eb1m trong d\u1ea3i \u0111\u1ed9ng \u0111\u01b0\u1ee3c n\u00eau trong b\u1ea3ng d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt (datasheet) c\u1ee7a b\u1ed9 thu ph\u00e1t \u0111\u1ec3 tr\u00e1nh l\u1ed7i ho\u1eb7c m\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">X\u00e1c minh b\u01b0\u1edbc s\u00f3ng kh\u1edbp \u1edf c\u1ea3 hai \u0111\u1ea7u<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c nh\u1eadn r\u1eb1ng b\u01b0\u1edbc s\u00f3ng c\u1ee7a b\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu t\u01b0\u01a1ng th\u00edch v\u1edbi nhau:<\/p>\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed1i v\u1edbi c\u00e1c li\u00ean k\u1ebft SR\/LR ti\u00eau chu\u1ea9n, c\u1ea3 hai \u0111\u1ea7u \u0111\u1ec1u s\u1eed d\u1ee5ng b\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh gi\u1ed1ng nhau.<\/p><\/li>\n\n\n\n<li><p>For <a href=\"https:\/\/www.l-p.com\/store-27039-1g-bidi-sfp.htm\" target=\"_self\"><strong>SFP BiDi<\/strong><\/a>, b\u01b0\u1edbc s\u00f3ng TX v\u00e0 RX ph\u1ea3i \u0111\u01b0\u1ee3c gh\u00e9p n\u1ed1i \u0111\u00fang c\u00e1ch (v\u00ed d\u1ee5: 1310 nm TX \/ 1550 nm RX \u1edf m\u1ed9t \u0111\u1ea7u, \u0111\u1ea3o ng\u01b0\u1ee3c \u1edf \u0111\u1ea7u kia).<\/p><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><p>Ki\u1ec3m tra l\u1ea1i k\u1ef9 l\u01b0\u1ee1ng <a href=\"https:\/\/resources.l-p.com\/vi\/knowledge-center\/how-eeprom-powers-sfp-and-qsfp-optical-modules\/\" target=\"_blank\" rel=\"\">M\u00e3 h\u00f3a EEPROM<\/a> v\u00e0 danh s\u00e1ch t\u01b0\u01a1ng th\u00edch c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ec3 tr\u00e1nh t\u00ecnh tr\u1ea1ng thi\u1ebft b\u1ecb ch\u1ee7 t\u1eeb ch\u1ed1i ho\u1eb7c chuy\u1ec3n sang tr\u1ea1ng th\u00e1i \u201cerr-disabled\u201d.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>K\u1ebft lu\u1eadn:<\/strong><br>B\u1eb1ng c\u00e1ch tu\u00e2n theo quy tr\u00ecnh t\u1eebng b\u01b0\u1edbc n\u00e0y\u2014x\u00e1c \u0111\u1ecbnh lo\u1ea1i c\u00e1p quang, \u0111o kho\u1ea3ng c\u00e1ch, t\u00ednh to\u00e1n suy hao li\u00ean k\u1ebft, ki\u1ec3m tra \u0111\u1ed9 nh\u1ea1y c\u1ee7a b\u1ed9 thu v\u00e0 kh\u1edbp b\u01b0\u1edbc s\u00f3ng\u2014k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 t\u1ef1 tin l\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng SFP ph\u00f9 h\u1ee3p v\u00e0 gi\u1ea3m thi\u1ec3u l\u1ed7i tri\u1ec3n khai.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u21aa\ufe0f&nbsp;<\/strong>Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn khi ch\u1ecdn b\u01b0\u1edbc s\u00f3ng SFP v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng SFP ch\u00ednh x\u00e1c l\u00e0 r\u1ea5t quan tr\u1ecdng, nh\u01b0ng k\u1ef9 s\u01b0 th\u01b0\u1eddng g\u1eb7p s\u1ef1 c\u1ed1 v\u1eadn h\u00e0nh khi c\u00e1c li\u00ean k\u1ebft \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh sai. Hi\u1ec3u r\u00f5 nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1c bi\u1ec3u hi\u1ec7n c\u1ee7a ch\u00fang gi\u00fap ng\u0103n ng\u1eeba th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t m\u1ea1ng \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/247ab5c9317e4634b3003787ce192ca3.jpg\" alt=\"Common SFP Wavelength Mistakes and Troubleshooting\" class=\"wp-image-3261\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/247ab5c9317e4634b3003787ce192ca3.jpg 1200w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/247ab5c9317e4634b3003787ce192ca3-300x169.jpg 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/247ab5c9317e4634b3003787ce192ca3-1024x576.jpg 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/247ab5c9317e4634b3003787ce192ca3-768x432.jpg 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/247ab5c9317e4634b3003787ce192ca3-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Sai b\u01b0\u1edbc s\u00f3ng<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>V\u1ea5n \u0111\u1ec1:<\/strong> B\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu ho\u1ea1t \u0111\u1ed9ng \u1edf c\u00e1c b\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh kh\u00e1c nhau (v\u00ed d\u1ee5: TX 1310 nm k\u1ebft n\u1ed1i v\u1edbi RX 1550 nm).<\/p><\/li>\n\n\n\n<li><p><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> Kh\u00f4ng thi\u1ebft l\u1eadp \u0111\u01b0\u1ee3c li\u00ean k\u1ebft ho\u1eb7c k\u1ebft n\u1ed1i ch\u1eadp ch\u1eddn.<\/p><\/li>\n\n\n\n<li><p><strong>Ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1:<\/strong> X\u00e1c minh b\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh tr\u00ean c\u1ea3 hai <a href=\"https:\/\/www.l-p.com\/store-27039-1g-bidi-sfp.htm\" target=\"_self\">SFP<br><\/a> v\u00e0 \u0111\u1ea3m b\u1ea3o ch\u00fang ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i c\u00e1p quang c\u0169ng nh\u01b0 \u1ee9ng d\u1ee5ng.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Nh\u1ea7m l\u1eabn gi\u1eefa c\u00e1p \u0111a mode (MMF) v\u00e0 c\u00e1p \u0111\u01a1n mode (SMF)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>V\u1ea5n \u0111\u1ec1:<\/strong> M\u1ed9t SFP \u0111a mode <a href=\"https:\/\/www.l-p.com\/products\/482246.htm\" target=\"_self\">850 nm<\/a> \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi c\u00e1p \u0111\u01a1n mode, ho\u1eb7c SFP \u0111\u01a1n mode 1310\/1550 nm \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean c\u00e1p \u0111a mode.<\/p><\/li>\n\n\n\n<li><p><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> Li\u00ean k\u1ebft ch\u1eadp ch\u1eddn, t\u1ef7 l\u1ec7 l\u1ed7i bit cao ho\u1eb7c ho\u00e0n to\u00e0n th\u1ea5t b\u1ea1i.<\/p><\/li>\n\n\n\n<li><p><strong>Ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1:<\/strong> X\u00e1c nh\u1eadn lo\u1ea1i c\u00e1p v\u00e0 thay th\u1ebf SFP b\u1eb1ng module t\u01b0\u01a1ng th\u00edch v\u1edbi lo\u1ea1i c\u00e1p \u0111\u00f3.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Sai c\u1eb7p SFP BiDi<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>V\u1ea5n \u0111\u1ec1:<\/strong> Hai chi\u1ec1u<a href=\"https:\/\/www.l-p.com\/products\/476695.htm\" target=\"_self\"> C\u00e1c module SFP<\/a> (BiDi) c\u00f3 b\u01b0\u1edbc s\u00f3ng TX\/RX b\u1ecb \u0111\u1ea3o ng\u01b0\u1ee3c.<\/p><\/li>\n\n\n\n<li><p><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> C\u1ed5ng b\u1ecb \u0111\u1eb7t v\u00e0o tr\u1ea1ng th\u00e1i \u201cerr-disabled\u201d ho\u1eb7c kh\u00f4ng c\u00f3 d\u1eef li\u1ec7u DOM.<\/p><\/li>\n\n\n\n<li><p><strong>Ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1:<\/strong> \u0110\u1ed5i v\u1ecb tr\u00ed hai module SFP \u1edf m\u1ed9t \u0111\u1ea7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o b\u01b0\u1edbc s\u00f3ng TX v\u00e0 RX kh\u1edbp \u0111\u00fang. Ki\u1ec3m tra m\u00e3 h\u00f3a EEPROM \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o gh\u00e9p c\u1eb7p BiDi ch\u00ednh x\u00e1c.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Gi\u1ea3i th\u00edch v\u1ec1 vi\u1ec7c gh\u00e9p c\u1eb7p b\u01b0\u1edbc s\u00f3ng SFP BiDi<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c module SFP BiDi (Bidirectional)<\/strong> truy\u1ec1n v\u00e0 nh\u1eadn t\u00edn hi\u1ec7u tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p quang duy nh\u1ea5t b\u1eb1ng hai b\u01b0\u1edbc s\u00f3ng kh\u00e1c nhau. C\u00e1c c\u1eb7p ph\u1ed5 bi\u1ebfn bao g\u1ed3m <strong>1310 nm TX \/ 1550 nm RX<\/strong> and <strong>1550 nm TX \/ 1310 nm RX<\/strong>, cho ph\u00e9p truy\u1ec1n th\u00f4ng song c\u00f4ng tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p thay v\u00ec hai s\u1ee3i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>V\u00ec sao c\u00e1c b\u01b0\u1edbc s\u00f3ng ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ea3o ng\u01b0\u1ee3c<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Trong m\u1ed9t li\u00ean k\u1ebft BiDi, b\u1ed9 ph\u00e1t \u1edf m\u1ed9t \u0111\u1ea7u ph\u1ea3i kh\u1edbp v\u1edbi b\u01b0\u1edbc s\u00f3ng b\u1ed9 thu \u1edf \u0111\u1ea7u kia.<\/p><\/li>\n\n\n\n<li><p>Example:<\/p>\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u1ecba \u0111i\u1ec3m A:<\/strong> 1310 nm TX \u2192 1550 nm RX<\/p><\/li>\n\n\n\n<li><p><strong>\u0110\u1ecba \u0111i\u1ec3m B:<\/strong> 1550 nm TX \u2192 1310 nm RX<\/p><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><p>\u0110\u1ea3o ng\u01b0\u1ee3c c\u1eb7p \u1edf b\u1ea5t k\u1ef3 \u0111\u1ea7u n\u00e0o s\u1ebd ng\u0103n t\u00edn hi\u1ec7u truy\u1ec1n kh\u00f4ng \u0111\u1ebfn \u0111\u01b0\u1ee3c b\u1ed9 thu \u0111\u00fang, d\u1eabn \u0111\u1ebfn m\u1ea5t li\u00ean k\u1ebft ho\u1eb7c c\u1ed5ng b\u1ecb l\u1ed7i (err-disabled).<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c l\u1ed7i tri\u1ec3n khai ph\u1ed5 bi\u1ebfn<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><p><strong>Gh\u00e9p n\u1ed1i BiDi sai<\/strong>: L\u1eafp hai m\u00f4-\u0111un c\u00f3 c\u00f9ng b\u01b0\u1edbc s\u00f3ng TX \u1edf c\u1ea3 hai \u0111\u1ea7u.<\/p>\n<ul class=\"wp-block-list\">\n<li><p>Tri\u1ec7u ch\u1ee9ng: M\u1ea5t li\u00ean k\u1ebft, kh\u00f4ng c\u00f3 d\u1eef li\u1ec7u DOM.<\/p><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><p><strong>S\u1eed d\u1ee5ng BiDi tr\u00ean lo\u1ea1i s\u1ee3i quang sai<\/strong>: BiDi \u0111a mode (MMF) tr\u00ean s\u1ee3i \u0111\u01a1n mode (SMF) ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n<ul class=\"wp-block-list\">\n<li><p>Tri\u1ec7u ch\u1ee9ng: K\u1ebft n\u1ed1i ch\u1eadp ch\u1eddn ho\u1eb7c t\u1ef7 l\u1ec7 l\u1ed7i bit (BER) cao.<\/p><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><p><strong>Kh\u00f4ng kh\u1edbp EEPROM<\/strong>: C\u00e1c m\u00f4-\u0111un BiDi c\u1ee7a b\u00ean th\u1ee9 ba kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn c\u00f3 th\u1ec3 c\u00f3 m\u00e3 nh\u00e0 cung c\u1ea5p sai.<\/p>\n<ul class=\"wp-block-list\">\n<li><p>Tri\u1ec7u ch\u1ee9ng: Thi\u1ebft b\u1ecb t\u1eeb ch\u1ed1i ho\u1eb7c giao di\u1ec7n b\u1ecb l\u1ed7i (err-disabled).<\/p><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u00e0i h\u1ecdc k\u1ef9 thu\u1eadt:<\/strong><br>Lu\u00f4n x\u00e1c minh r\u1eb1ng c\u00e1c m\u00f4-\u0111un SFP BiDi \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u0111\u00fang theo c\u1eb7p <strong>b\u1ed5 sung TX\/RX<\/strong> v\u00e0 t\u01b0\u01a1ng th\u00edch v\u1edbi lo\u1ea1i s\u1ee3i quang \u0111\u00fang. Vi\u1ec7c gh\u00e9p n\u1ed1i ch\u00ednh x\u00e1c \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng song c\u00f4ng tr\u00ean s\u1ee3i \u0111\u01a1n \u0111\u00e1ng tin c\u1eady v\u00e0 tr\u00e1nh vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 t\u1ed1n k\u00e9m.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u1ecf qua hi\u1ec7n t\u01b0\u1ee3ng t\u00e1n s\u1eafc<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>V\u1ea5n \u0111\u1ec1:<\/strong> C\u00e1c li\u00ean k\u1ebft s\u1ee3i \u0111\u01a1n mode d\u00e0i v\u01b0\u1ee3t qu\u00e1 ng\u00e2n s\u00e1ch t\u00e1n s\u1eafc \u0111\u1ed1i v\u1edbi b\u01b0\u1edbc s\u00f3ng v\u00e0 t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u \u0111\u00e3 ch\u1ecdn.<\/p><\/li>\n\n\n\n<li><p><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> T\u1ef7 l\u1ec7 l\u1ed7i bit t\u0103ng l\u00ean ho\u1eb7c suy gi\u1ea3m t\u00edn hi\u1ec7u theo kho\u1ea3ng c\u00e1ch.<\/p><\/li>\n\n\n\n<li><p><strong>Ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1:<\/strong> T\u00ednh to\u00e1n \u0111\u1ed9 t\u00e1n s\u1eafc quang h\u1ecdc cho c\u00e1c li\u00ean k\u1ebft 1310\/1550 nm. S\u1eed d\u1ee5ng s\u1ee3i quang b\u00f9 t\u00e1n s\u1eafc ho\u1eb7c ch\u1ecdn b\u1ed9 thu ph\u00e1t t\u1ed1c \u0111\u1ed9 th\u1ea5p h\u01a1n n\u1ebfu c\u1ea7n thi\u1ebft.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ed5n hao quang v\u01b0\u1ee3t ng\u00e2n s\u00e1ch<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>V\u1ea5n \u0111\u1ec1:<\/strong> T\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft v\u01b0\u1ee3t qu\u00e1 ng\u00e2n s\u00e1ch quang c\u1ee7a b\u1ed9 thu ph\u00e1t.<\/p><\/li>\n\n\n\n<li><p><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> S\u1ef1 c\u1ed1 m\u1ea5t li\u00ean k\u1ebft ng\u1eaft qu\u00e3ng, bi\u00ean \u0111\u1ed9 quang th\u1ea5p ho\u1eb7c t\u1ef7 l\u1ec7 l\u1ed7i bit (BER) kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p><\/li>\n\n\n\n<li><p><strong>Ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1:<\/strong> \u0110o t\u1ed5n hao t\u1ea1i \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i h\u00e0n, gi\u1ea3m chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn s\u1ee3i quang n\u1ebfu c\u00f3 th\u1ec3, ho\u1eb7c ch\u1ecdn c\u00e1c module SFP c\u00f3 c\u00f4ng su\u1ea5t cao h\u01a1n.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u00f3m t\u1eaft:<\/strong><br>Vi\u1ec7c ki\u1ec3m tra ch\u1ee7 \u0111\u1ed9ng b\u01b0\u1edbc s\u00f3ng, lo\u1ea1i s\u1ee3i quang, t\u1ed5n hao li\u00ean k\u1ebft v\u00e0 s\u1ef1 c\u0103n ch\u1ec9nh BiDi gi\u00fap ng\u0103n ng\u1eeba ph\u1ea7n l\u1edbn c\u00e1c s\u1ef1 c\u1ed1 li\u00ean quan \u0111\u1ebfn SFP. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u21aa\ufe0f&nbsp;<\/strong>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 b\u01b0\u1edbc s\u00f3ng SFP<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/8d24786d11644f02bd7079c54d980e01.jpg\" alt=\"SFP Wavelength FAQ\" class=\"wp-image-3262\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/8d24786d11644f02bd7079c54d980e01.jpg 1200w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/8d24786d11644f02bd7079c54d980e01-300x169.jpg 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/8d24786d11644f02bd7079c54d980e01-1024x576.jpg 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/8d24786d11644f02bd7079c54d980e01-768x432.jpg 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/8d24786d11644f02bd7079c54d980e01-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">C1: T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng SFP 850 nm tr\u00ean s\u1ee3i quang \u0111\u01a1n mode kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng. C\u00e1c module 850 nm \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u00e0nh ri\u00eang cho s\u1ee3i quang \u0111a mode. Vi\u1ec7c s\u1eed d\u1ee5ng ch\u00fang tr\u00ean s\u1ee3i quang \u0111\u01a1n mode c\u00f3 th\u1ec3 g\u00e2y suy hao cao, li\u00ean k\u1ebft kh\u00f4ng \u1ed5n \u0111\u1ecbnh ho\u1eb7c ho\u00e0n to\u00e0n th\u1ea5t b\u1ea1i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C2: \u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu c\u00e1c b\u01b0\u1edbc s\u00f3ng kh\u00f4ng kh\u1edbp nhau?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Li\u00ean k\u1ebft c\u00f3 th\u1ec3 kh\u00f4ng thi\u1ebft l\u1eadp \u0111\u01b0\u1ee3c ho\u1eb7c ho\u1ea1t \u0111\u1ed9ng b\u1ea5t \u1ed5n. B\u01b0\u1edbc s\u00f3ng ph\u00e1t (TX) v\u00e0 b\u01b0\u1edbc s\u00f3ng thu (RX) ph\u1ea3i t\u01b0\u01a1ng \u1ee9ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o vi\u1ec7c thu nh\u1eadn quang h\u1ecdc ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C3: Li\u1ec7u 1550 nm lu\u00f4n t\u1ed1t h\u01a1n 1310 nm hay kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng v\u1eady. 1550 nm cung c\u1ea5p kh\u1ea3 n\u0103ng truy\u1ec1n xa h\u01a1n v\u00e0 t\u01b0\u01a1ng th\u00edch v\u1edbi EDFA\/DWDM, nh\u01b0ng 1310 nm ho\u00e0n to\u00e0n \u0111\u1ee7 cho c\u00e1c li\u00ean k\u1ebft n\u1ed9i b\u1ed9 ho\u1eb7c \u0111\u00f4 th\u1ecb \u1edf kho\u1ea3ng c\u00e1ch trung b\u00ecnh v\u1edbi chi ph\u00ed th\u1ea5p h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C4: L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra b\u01b0\u1edbc s\u00f3ng SFP trong giao di\u1ec7n d\u00f2ng l\u1ec7nh (CLI)?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eed d\u1ee5ng c\u00e1c l\u1ec7nh nh\u01b0 <code>show interface transceiver<\/code> or <code>show inventory<\/code> \u0111\u1ec3 \u0111\u1ecdc tr\u1ef1c ti\u1ebfp lo\u1ea1i module, b\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh v\u00e0 c\u00e1c tham s\u1ed1 gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1 (DOM) t\u1eeb module SFP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C5: T\u00f4i c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p SFP BiDi v\u1edbi SFP ti\u00eau chu\u1ea9n kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng. C\u00e1c module SFP BiDi y\u00eau c\u1ea7u c\u1eb7p TX\/RX b\u1ed5 sung tr\u00ean m\u1ed9t s\u1ee3i quang duy nh\u1ea5t. Vi\u1ec7c k\u1ebft h\u1ee3p v\u1edbi SFP ti\u00eau chu\u1ea9n c\u00f3 th\u1ec3 khi\u1ebfn li\u00ean k\u1ebft kh\u00f4ng thi\u1ebft l\u1eadp \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C6: \u0110\u1ed9 dung sai b\u01b0\u1edbc s\u00f3ng ch\u00ednh x\u00e1c \u0111\u1ebfn m\u1ee9c n\u00e0o?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng th\u01b0\u1eddng l\u00e0 \u00b13\u201310 nm. \u0110\u1ed9 dung sai \u0111\u1ea3m b\u1ea3o s\u1ef1 c\u0103n ch\u1ec9nh v\u1edbi s\u1ee3i quang v\u00e0, trong c\u00e1c h\u1ec7 th\u1ed1ng DWDM, v\u1ecb tr\u00ed k\u00eanh \u0111\u00fang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C7: Vai tr\u00f2 c\u1ee7a DOM trong vi\u1ec7c x\u00e1c minh b\u01b0\u1edbc s\u00f3ng l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DOM gi\u00e1m s\u00e1t c\u00f4ng su\u1ea5t ph\u00e1t\/thu (Tx\/Rx), nhi\u1ec7t \u0111\u1ed9 v\u00e0 bi\u00ean \u0111\u1ed9 quang theo th\u1eddi gian th\u1ef1c, h\u1ed7 tr\u1ee3 x\u00e1c minh ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang b\u01b0\u1edbc s\u00f3ng v\u00e0 ph\u00e1t hi\u1ec7n s\u1edbm c\u00e1c v\u1ea5n \u0111\u1ec1 ti\u1ec1m \u1ea9n tr\u00ean li\u00ean k\u1ebft.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u21aa\ufe0f&nbsp;<\/strong>Danh s\u00e1ch ki\u1ec3m tra x\u00e1c th\u1ef1c tri\u1ec3n khai b\u01b0\u1edbc s\u00f3ng SFP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady c\u1ee7a SFP \u0111\u00f2i h\u1ecfi m\u1ed9t quy tr\u00ecnh x\u00e1c th\u1ef1c h\u1ec7 th\u1ed1ng. Danh s\u00e1ch ki\u1ec3m tra sau \u0111\u00e2y gi\u00fap k\u1ef9 s\u01b0 x\u00e1c nh\u1eadn r\u1eb1ng vi\u1ec7c l\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng v\u00e0 thi\u1ebft l\u1eadp li\u00ean k\u1ebft \u0111\u00e1p \u1ee9ng \u0111\u1ea7y \u0111\u1ee7 c\u00e1c y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u2714 Kh\u1edbp lo\u1ea1i s\u1ee3i quang<\/strong><br>\u0110\u1ea3m b\u1ea3o b\u01b0\u1edbc s\u00f3ng SFP ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i s\u1ee3i quang \u0111\u00e3 l\u1eafp \u0111\u1eb7t: 850 nm cho s\u1ee3i \u0111a mode (MMF), 1310 nm ho\u1eb7c 1550 nm cho s\u1ee3i \u0111\u01a1n mode (SMF). Vi\u1ec7c kh\u00f4ng kh\u1edbp lo\u1ea1i s\u1ee3i c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ea5t li\u00ean k\u1ebft ho\u1eb7c hi\u1ec7u n\u0103ng suy gi\u1ea3m.<\/p><\/li>\n\n\n\n<li><p><strong>\u2714 Kh\u1edbp b\u01b0\u1edbc s\u00f3ng \u1edf c\u1ea3 hai \u0111\u1ea7u<\/strong><br>X\u00e1c minh r\u1eb1ng b\u01b0\u1edbc s\u00f3ng ph\u00e1t (TX) \u1edf m\u1ed9t \u0111\u1ea7u t\u01b0\u01a1ng \u1ee9ng v\u1edbi b\u01b0\u1edbc s\u00f3ng thu (RX) \u1edf \u0111\u1ea7u kia. \u0110\u1ed1i v\u1edbi SFP BiDi, h\u00e3y x\u00e1c nh\u1eadn r\u1eb1ng b\u01b0\u1edbc s\u00f3ng TX v\u00e0 RX b\u1ed5 sung cho nhau.<\/p><\/li>\n\n\n\n<li><p><strong>\u2714 X\u00e1c nh\u1eadn ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t<\/strong><br>T\u00ednh t\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft (s\u1ee3i quang, \u0111\u1ea7u n\u1ed1i, m\u1ed1i h\u00e0n) v\u00e0 \u0111\u1ea3m b\u1ea3o gi\u00e1 tr\u1ecb n\u00e0y kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 ng\u00e2n s\u00e1ch quang c\u1ee7a b\u1ed9 thu ph\u00e1t. Duy tr\u00ec bi\u00ean \u0111\u1ed9 \u0111\u1ee7 \u0111\u1ec3 b\u00f9 \u0111\u1eafp c\u00e1c bi\u1ebfn \u0111\u1ed5i m\u00f4i tr\u01b0\u1eddng.<\/p><\/li>\n\n\n\n<li><p><strong>\u2714 Ki\u1ec3m tra gi\u00e1 tr\u1ecb DOM<\/strong><br>S\u1eed d\u1ee5ng Gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1 (DOM) \u0111\u1ec3 ki\u1ec3m tra c\u00f4ng su\u1ea5t ph\u00e1t\/thu (Tx\/Rx), bi\u00ean \u0111\u1ed9 quang v\u00e0 nhi\u1ec7t \u0111\u1ed9 theo th\u1eddi gian th\u1ef1c. Vi\u1ec7c x\u00e1c minh DOM gi\u00fap ph\u00e1t hi\u1ec7n s\u1edbm c\u00e1c b\u01b0\u1edbc s\u00f3ng kh\u00f4ng c\u0103n ch\u1ec9nh ho\u1eb7c s\u1ee3i quang b\u1ecb suy gi\u1ea3m.<\/p><\/li>\n\n\n\n<li><p><strong>\u2714 Duy tr\u00ec t\u00ednh nh\u1ea5t qu\u00e1n firmware<\/strong><br>\u0110\u1ea3m b\u1ea3o firmware c\u1ee7a switch ho\u1eb7c router t\u01b0\u01a1ng th\u00edch v\u1edbi nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 lo\u1ea1i module SFP. Vi\u1ec7c kh\u00f4ng nh\u1ea5t qu\u00e1n firmware c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c c\u1ed5ng b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a do l\u1ed7i ho\u1eb7c module b\u1ecb t\u1eeb ch\u1ed1i.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u00f3m t\u1eaft k\u1ef9 thu\u1eadt:<\/strong><br>Tu\u00e2n th\u1ee7 danh s\u00e1ch ki\u1ec3m tra n\u00e0y gi\u00fap gi\u1ea3m thi\u1ec3u c\u00e1c l\u1ed7i tri\u1ec3n khai li\u00ean quan \u0111\u1ebfn b\u01b0\u1edbc s\u00f3ng, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady c\u1ee7a li\u00ean k\u1ebft quang v\u00e0 h\u1ed7 tr\u1ee3 t\u00ednh \u1ed5n \u0111\u1ecbnh v\u1eadn h\u00e0nh tr\u00ean c\u1ea3 m\u1ea1ng t\u1ea7m ng\u1eafn v\u00e0 t\u1ea7m xa.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/4288e3dd4fab454e8ca289dd03d86cae.jpg\" alt=\"SFP Wavelength Deployment Validation Checklist\" class=\"wp-image-3263\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/4288e3dd4fab454e8ca289dd03d86cae.jpg 1200w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/4288e3dd4fab454e8ca289dd03d86cae-300x169.jpg 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/4288e3dd4fab454e8ca289dd03d86cae-1024x576.jpg 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/4288e3dd4fab454e8ca289dd03d86cae-768x432.jpg 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/4288e3dd4fab454e8ca289dd03d86cae-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u00fang <strong>B\u01b0\u1edbc s\u00f3ng SFP<\/strong>\u2014d\u00f9 l\u00e0 850 nm cho \u1ee9ng d\u1ee5ng t\u1ea7m ng\u1eafn tr\u00ean s\u1ee3i \u0111a mode, 1310 nm cho \u1ee9ng d\u1ee5ng t\u1ea7m trung tr\u00ean s\u1ee3i \u0111\u01a1n mode, hay 1550 nm cho \u1ee9ng d\u1ee5ng \u0111\u01b0\u1eddng d\u00e0i v\u00e0 DWDM\u2014l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ed1i v\u1edbi hi\u1ec7u n\u0103ng m\u1ea1ng quang \u0111\u00e1ng tin c\u1eady. Vi\u1ec7c hi\u1ec3u r\u00f5 suy hao, t\u00e1n s\u1eafc, ng\u00e2n s\u00e1ch li\u00ean k\u1ebft v\u00e0 gi\u00e1m s\u00e1t DOM \u0111\u1ea3m b\u1ea3o c\u00e1c b\u1ed9 thu ph\u00e1t ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u01b0u trong gi\u1edbi h\u1ea1n th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u00e3 n\u00eau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c quy tr\u00ecnh tri\u1ec3n khai v\u00e0 x\u00e1c th\u1ef1c c\u00f3 c\u1ea5u tr\u00fac\u2014bao g\u1ed3m x\u00e1c minh lo\u1ea1i s\u1ee3i quang, kh\u1edbp b\u01b0\u1edbc s\u00f3ng, t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t v\u00e0 ki\u1ec3m tra t\u00ednh nh\u1ea5t qu\u00e1n firmware\u2014gi\u00fap gi\u1ea3m thi\u1ec3u l\u1ed7i v\u00e0 t\u1ed1i \u0111a h\u00f3a \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft tr\u00ean c\u1ea3 m\u1ea1ng trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 m\u1ea1ng \u0111\u01b0\u1eddng d\u00e0i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c k\u1ef9 s\u01b0 \u0111ang t\u00ecm ki\u1ebfm <strong>c\u00e1c module SFP ch\u1ea5t l\u01b0\u1ee3ng cao, tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n<\/strong> v\u1edbi \u0111\u1eb7c t\u1ea3 b\u01b0\u1edbc s\u00f3ng ch\u00ednh x\u00e1c v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c \u0111\u1ea7y \u0111\u1ee7, h\u00e3y kh\u00e1m ph\u00e1 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/\"><strong>LINK-PP Official Store<\/strong><\/a> \u0111\u1ec3 xem nhi\u1ec1u l\u1ef1a ch\u1ecdn module SFP 850 nm, 1310 nm v\u00e0 1550 nm, bao g\u1ed3m c\u00e1c module c\u00f3 h\u1ed7 tr\u1ee3 DOM \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh v\u00e0 t\u00e0i li\u1ec7u \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n EEAT.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ti\u00eau chu\u1ea9n v\u00e0 \u0111\u1eb7c t\u1ea3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 thu ph\u00e1t SFP ho\u1ea1t \u0111\u1ed9ng theo c\u00e1c <strong>ti\u00eau chu\u1ea9n ng\u00e0nh<\/strong>, \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng, nh\u1eb1m \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c, hi\u1ec7u n\u0103ng d\u1ef1 b\u00e1o \u0111\u01b0\u1ee3c v\u00e0 gi\u00e1m s\u00e1t \u0111\u00e1ng tin c\u1eady. C\u00e1c t\u00e0i li\u1ec7u tham kh\u1ea3o ch\u00ednh bao g\u1ed3m <strong>IEEE 802.3z<\/strong>, <strong>IEEE 802.3ae<\/strong>, and <strong>Long-distance fiber links<\/strong>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u0110\u1ed9 dung sai b\u01b0\u1edbc s\u00f3ng<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ed7i module SFP c\u00f3 m\u1ed9t <strong>b\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh<\/strong> (v\u00ed d\u1ee5: 850 nm, 1310 nm, 1550 nm) k\u00e8m theo \u0111\u1ed9 dung sai quy \u0111\u1ecbnh, th\u01b0\u1eddng l\u00e0 \u00b13\u201310 nm t\u00f9y thu\u1ed9c v\u00e0o ti\u00eau chu\u1ea9n v\u00e0 t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u.<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ed9 dung sai \u0111\u1ea3m b\u1ea3o t\u00edn hi\u1ec7u quang c\u0103n ch\u1ec9nh v\u1edbi c\u1eeda s\u1ed5 t\u1ed5n hao th\u1ea5p c\u1ee7a s\u1ee3i quang v\u00e0, trong c\u00e1c \u1ee9ng d\u1ee5ng DWDM, v\u1edbi l\u01b0\u1edbi k\u00eanh \u0111\u00fang.<\/p><\/li>\n\n\n\n<li><p>Vi\u1ec7c v\u01b0\u1ee3t qu\u00e1 \u0111\u1ed9 dung sai c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn gi\u1ea3m bi\u00ean \u0111\u1ed9 li\u00ean k\u1ebft, t\u0103ng t\u1ef7 l\u1ec7 l\u1ed7i bit (BER) ho\u1eb7c m\u1ea5t li\u00ean k\u1ebft ho\u00e0n to\u00e0n.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">DOM (Gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1)<br><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>DOM<\/strong>, \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong <strong>Long-distance fiber links<\/strong>, cung c\u1ea5p kh\u1ea3 n\u0103ng gi\u00e1m s\u00e1t theo th\u1eddi gian th\u1ef1c c\u00e1c tham s\u1ed1 c\u1ee7a b\u1ed9 thu ph\u00e1t:<\/p>\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t ph\u00e1t (Tx)<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t thu (Rx)<\/p><\/li>\n\n\n\n<li><p>Nhi\u1ec7t \u0111\u1ed9 module<\/p><\/li>\n\n\n\n<li><p>\u0110i\u1ec7n \u00e1p cung c\u1ea5p<\/p><\/li>\n\n\n\n<li><p>D\u00f2ng ph\u00e2n c\u1ef1c laser<\/p><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><p>K\u1ef9 s\u01b0 s\u1eed d\u1ee5ng d\u1eef li\u1ec7u DOM \u0111\u1ec3 x\u00e1c th\u1ef1c hi\u1ec7u su\u1ea5t quang h\u1ecdc, x\u00e1c nh\u1eadn s\u1ef1 c\u0103n ch\u1ec9nh b\u01b0\u1edbc s\u00f3ng v\u00e0 ph\u00e1t hi\u1ec7n suy gi\u1ea3m ti\u1ec1m \u1ea9n tr\u01b0\u1edbc khi n\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 tin c\u1eady c\u1ee7a li\u00ean k\u1ebft.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u00f3m t\u1eaft k\u1ef9 thu\u1eadt:<\/strong><br>Tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n IEEE v\u00e0 SFF \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c m\u00f4-\u0111un SFP \u0111\u00e1p \u1ee9ng c\u00e1c \u0111\u1eb7c t\u1ea3 b\u01b0\u1edbc s\u00f3ng v\u00e0 cung c\u1ea5p kh\u1ea3 n\u0103ng gi\u00e1m s\u00e1t DOM \u0111\u00e1ng tin c\u1eady, t\u1eeb \u0111\u00f3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c, vi\u1ec7c g\u1ee1 l\u1ed7i d\u1ec5 d\u00e0ng h\u01a1n v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb t\u1eeb c\u00e1c nh\u00e0 cung c\u1ea5p kh\u00e1c nhau.<\/p>","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn t\u00e1c gi\u1ea3 v\u1ec1 b\u01b0\u1edbc s\u00f3ng SFP: So s\u00e1nh \u1ee9ng d\u1ee5ng c\u1ee7a 850nm, 1310nm v\u00e0 1550nm; \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ng\u00e2n s\u00e1ch li\u00ean k\u1ebft (link budget); l\u1ef1a ch\u1ecdn gi\u1eefa \u0111a mode v\u00e0 \u0111\u01a1n mode; kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c (interoperability); v\u00e0 danh s\u00e1ch ki\u1ec3m tra (checklist).<\/p>","protected":false},"author":1,"featured_media":3254,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[26],"class_list":["post-3264","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/posts\/3264","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/comments?post=3264"}],"version-history":[{"count":4,"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/posts\/3264\/revisions"}],"predecessor-version":[{"id":10771,"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/posts\/3264\/revisions\/10771"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/media\/3254"}],"wp:attachment":[{"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/media?parent=3264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/categories?post=3264"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/tags?post=3264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}