{"id":4906,"date":"2025-09-25T11:12:00","date_gmt":"2025-09-25T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/how-to-measure-the-spacing-of-optical-channels-in-systems\/"},"modified":"2026-05-25T10:13:05","modified_gmt":"2026-05-25T10:13:05","slug":"how-to-measure-the-spacing-of-optical-channels-in-systems","status":"publish","type":"post","link":"https:\/\/resources.l-p.com\/vi\/knowledge-center\/how-to-measure-the-spacing-of-optical-channels-in-systems","title":{"rendered":"C\u00e1ch x\u00e1c \u0111\u1ecbnh v\u00e0 \u0111o kho\u1ea3ng c\u00e1ch k\u00eanh trong c\u00e1c h\u1ec7 th\u1ed1ng quang h\u1ecdc"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1312\" height=\"736\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/665c99baa8b446b7866f7a9cff17ed68.webp\" alt=\"How to Identify and Measure Channel Spacing in Optical Systems\" class=\"wp-image-4903\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/665c99baa8b446b7866f7a9cff17ed68.webp 1312w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/665c99baa8b446b7866f7a9cff17ed68-300x168.webp 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/665c99baa8b446b7866f7a9cff17ed68-1024x574.webp 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/665c99baa8b446b7866f7a9cff17ed68-768x431.webp 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/665c99baa8b446b7866f7a9cff17ed68-18x10.webp 18w\" sizes=\"(max-width: 1312px) 100vw, 1312px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong th\u1ebf gi\u1edbi truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/vi\/glossary\/what-is-dwdm-explaining-dense-wavelength-division-multiplexing\/\"><strong>\u0110a b\u01b0\u1edbc s\u00f3ng m\u1eadt \u0111\u1ed9 cao (DWDM)<\/strong><\/a> l\u00e0 m\u1ed9t b\u01b0\u1edbc \u0111\u1ed9t ph\u00e1, cho ph\u00e9p nhi\u1ec1u t\u00edn hi\u1ec7u mang quang di chuy\u1ec3n tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p duy nh\u1ea5t. L\u00f5i c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y n\u1eb1m \u1edf \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a n\u00f3, c\u1ee5 th\u1ec3 l\u00e0 \u1edf <strong>kho\u1ea3ng c\u00e1ch k\u00eanh s\u1ee3i quang<\/strong>\u2014kho\u1ea3ng c\u00e1ch t\u1ea7n s\u1ed1 ho\u1eb7c b\u01b0\u1edbc s\u00f3ng ch\u00ednh x\u00e1c gi\u1eefa c\u00e1c t\u00edn hi\u1ec7u n\u00e0y. Kho\u1ea3ng c\u00e1ch kh\u00f4ng \u0111\u00fang c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/vi\/glossary\/crosstalk-definition-causes-types-effects\/\"><strong>crosstalk<\/strong><\/a>, suy gi\u1ea3m t\u00edn hi\u1ec7u v\u00e0 th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng t\u1ed1n k\u00e9m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p r\u00f5 r\u00e0ng, t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 \u0111o l\u01b0\u1eddng v\u00e0 x\u00e1c minh kho\u1ea3ng c\u00e1ch k\u00eanh s\u1ee3i quang, \u0111\u1ea3m b\u1ea3o m\u1ea1ng quang c\u1ee7a b\u1ea1n v\u1eadn h\u00e0nh \u1edf hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\ud83d\udcdd T\u00f3m t\u1eaft nh\u1eefng \u0111i\u1ec3m ch\u00ednh<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Kho\u1ea3ng c\u00e1ch k\u00eanh<\/strong> c\u00f3 ngh\u0129a l\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c k\u00eanh quang. Bi\u1ebft \u0111\u01b0\u1ee3c kho\u1ea3ng c\u00e1ch ph\u00f9 h\u1ee3p s\u1ebd ng\u0103n c\u00e1c t\u00edn hi\u1ec7u b\u1ecb tr\u1ed9n l\u1eabn. N\u00f3 c\u0169ng gi\u00fap h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng t\u1ed1t.<\/p><\/li>\n\n\n\n<li><p>S\u1eed d\u1ee5ng m\u1ed9t <strong>m\u00e1y ph\u00e2n t\u00edch ph\u1ed5 quang (OSA)<\/strong> \u0111\u1ec3 ki\u1ec3m tra kho\u1ea3ng c\u00e1ch k\u00eanh. C\u1eafm s\u1ee3i quang v\u00e0o thi\u1ebft b\u1ecb. Thi\u1ebft l\u1eadp d\u1ea3i \u0111o. \u0110o kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111\u1ec9nh.<\/p><\/li>\n\n\n\n<li><p>Xem b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a h\u1ec7 th\u1ed1ng b\u1ea1n \u0111\u1ec3 bi\u1ebft c\u00e1c gi\u00e1 tr\u1ecb kho\u1ea3ng c\u00e1ch k\u00eanh. \u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n ki\u1ec3m tra k\u1ebft qu\u1ea3 \u0111o. N\u00f3 c\u0169ng h\u1ed7 tr\u1ee3 b\u1ea1n l\u1eadp k\u1ebf ho\u1ea1ch n\u00e2ng c\u1ea5p.<\/p><\/li>\n\n\n\n<li><p>Gi\u1eef s\u1ea1ch v\u00e0 thi\u1ebft l\u1eadp \u0111\u00fang c\u00e1c c\u00f4ng c\u1ee5 c\u1ee7a b\u1ea1n. Th\u1ef1c hi\u1ec7n ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a ph\u00e9p \u0111o. N\u00f3 c\u0169ng ng\u0103n ng\u1eeba sai s\u00f3t.<\/p><\/li>\n\n\n\n<li><p>N\u1ebfu b\u1ea1n g\u1eb7p s\u1ef1 c\u1ed1, h\u00e3y \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u1ee7a OSA. Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9. L\u00e0m s\u1ea1ch c\u00e1c \u0111\u1ea7u n\u1ed1i \u0111\u1ec3 \u0111\u1ea1t k\u1ebft qu\u1ea3 t\u1ed1t h\u01a1n.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\ud83d\udcdd V\u00ec sao kho\u1ea3ng c\u00e1ch k\u00eanh s\u1ee3i quang l\u1ea1i quan tr\u1ecdng<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng kho\u1ea3ng c\u00e1ch k\u00eanh s\u1ee3i quang gi\u1ed1ng nh\u01b0 c\u00e1c l\u00e0n \u0111\u01b0\u1eddng tr\u00ean xa l\u1ed9. N\u1ebfu c\u00e1c l\u00e0n qu\u00e1 h\u1eb9p, c\u00e1c xe (t\u00edn hi\u1ec7u d\u1eef li\u1ec7u) s\u1ebd va ch\u1ea1m nhau. C\u00e1c h\u1ec7 th\u1ed1ng DWDM ti\u00eau chu\u1ea9n th\u01b0\u1eddng s\u1eed d\u1ee5ng kho\u1ea3ng c\u00e1ch <strong>100 GHz (kho\u1ea3ng 0,8 nm)<\/strong> or <strong>50 GHz (kho\u1ea3ng 0,4 nm)<\/strong> trong d\u1ea3i C. C\u00e1c h\u1ec7 th\u1ed1ng si\u00eau d\u00e0y \u0111\u1eb7c th\u1eadm ch\u00ed c\u00f3 th\u1ec3 xu\u1ed1ng t\u1edbi 25 GHz.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c \u0111\u1ea3m b\u1ea3o kho\u1ea3ng c\u00e1ch ch\u00ednh x\u00e1c l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ed1i v\u1edbi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>T\u1ed1i \u0111a h\u00f3a b\u0103ng th\u00f4ng:<\/strong> Cho ph\u00e9p nhi\u1ec1u k\u00eanh h\u01a1n tr\u00ean m\u1ed7i s\u1ee3i quang.<\/p><\/li>\n\n\n\n<li><p style=\"margin: 0px;\"><strong>Gi\u1ea3m nhi\u1ec5u xuy\u00ean k\u00eanh (crosstalk) \u1edf m\u1ee9c t\u1ed1i thi\u1ec3u:<\/strong> Ng\u0103n c\u00e1c k\u00eanh li\u1ec1n k\u1ec1 g\u00e2y nhi\u1ec5u l\u1eabn nhau.<\/p><\/li>\n\n\n\n<li><p style=\"margin: 0px;\"><strong>\u0110\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u:<\/strong> Duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i.<\/p><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1312\" height=\"736\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/aa32402fb09149cabde2bfb1cccd0097.webp\" alt=\"Fiber Channel Spacing\" class=\"wp-image-4904\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/aa32402fb09149cabde2bfb1cccd0097.webp 1312w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/aa32402fb09149cabde2bfb1cccd0097-300x168.webp 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/aa32402fb09149cabde2bfb1cccd0097-1024x574.webp 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/aa32402fb09149cabde2bfb1cccd0097-768x431.webp 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/aa32402fb09149cabde2bfb1cccd0097-18x10.webp 18w\" sizes=\"(max-width: 1312px) 100vw, 1312px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\ud83d\udcdd C\u00e1c c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu \u0111\u1ec3 \u0111o l\u01b0\u1eddng<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u, b\u1ea1n c\u1ea7n c\u00f3 thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p. C\u00f4ng c\u1ee5 ch\u00ednh \u0111\u1ec3 th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5 n\u00e0y l\u00e0 m\u1ed9t <strong>M\u00e1y ph\u00e2n t\u00edch ph\u1ed5 quang (OSA)<\/strong>.<\/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;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>C\u00f4ng c\u1ee5<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ch\u1ee9c n\u0103ng ch\u00ednh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Th\u00f4ng s\u1ed1 \u0111o l\u01b0\u1eddng ch\u1ee7 ch\u1ed1t<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>M\u00e1y ph\u00e2n t\u00edch ph\u1ed5 quang (OSA)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Hi\u1ec3n th\u1ecb ph\u00e2n b\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a t\u00edn hi\u1ec7u quang theo h\u00e0m b\u01b0\u1edbc s\u00f3ng.<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>B\u01b0\u1edbc s\u00f3ng trung t\u00e2m, quang h\u1ecdc <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/vi\/glossary\/snr-signal-to-noise-ratio-and-its-impact-on-signal-quality\/\"><strong>T\u1ef7 l\u1ec7 t\u00edn hi\u1ec7u tr\u00ean nhi\u1ec5u (SNR)<\/strong><\/a>, kho\u1ea3ng c\u00e1ch k\u00eanh.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Ngu\u1ed3n DWDM \/ Laser \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ea1o ra c\u00e1c b\u01b0\u1edbc s\u00f3ng ch\u00ednh x\u00e1c v\u00e0 \u1ed5n \u0111\u1ecbnh \u0111\u1ec3 ki\u1ec3m tra.<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m t\u00edn hi\u1ec7u tham chi\u1ebfu.<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>H\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc: C\u00e1ch \u0111o kho\u1ea3ng c\u00e1ch k\u00eanh<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L\u00e0m theo c\u00e1c b\u01b0\u1edbc sau \u0111\u1ec3 \u0111o ch\u00ednh x\u00e1c kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c k\u00eanh b\u1eb1ng OSA.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Thi\u1ebft l\u1eadp v\u00e0 hi\u1ec7u chu\u1ea9n:<\/strong> K\u1ebft n\u1ed1i \u0111\u1ea7u ra s\u1ee3i quang t\u1eeb h\u1ec7 th\u1ed1ng DWDM c\u1ee7a b\u1ea1n v\u1edbi c\u1ed5ng \u0111\u1ea7u v\u00e0o c\u1ee7a OSA. \u0110\u1ec3 OSA v\u00e0 thi\u1ebft b\u1ecb m\u1ea1ng \u1ed5n \u0111\u1ecbnh b\u1eb1ng c\u00e1ch kh\u1edfi \u0111\u1ed9ng tr\u01b0\u1edbc. Th\u1ef1c hi\u1ec7n hi\u1ec7u chu\u1ea9n nhanh OSA theo h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t nh\u1eb1m \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c c\u01a1 b\u1ea3n.<\/p><\/li>\n\n\n\n<li><p style=\"margin: 0px;\"><strong>Ghi l\u1ea1i ph\u1ed5 quang:<\/strong> C\u1ea5u h\u00ecnh OSA \u0111\u1ec3 qu\u00e9t d\u1ea3i b\u01b0\u1edbc s\u00f3ng ph\u00f9 h\u1ee3p (v\u00ed d\u1ee5: d\u1ea3i C t\u1eeb 1530 nm \u0111\u1ebfn 1565 nm). B\u1eaft \u0111\u1ea7u qu\u00e9t. B\u1ea1n s\u1ebd th\u1ea5y bi\u1ec3u \u0111\u1ed3 ph\u1ed5 v\u1edbi c\u00e1c \u0111\u1ec9nh ri\u00eang bi\u1ec7t \u0111\u1ea1i di\u1ec7n cho t\u1eebng k\u00eanh DWDM \u0111ang ho\u1ea1t \u0111\u1ed9ng.<\/p><\/li>\n\n\n\n<li><p style=\"margin: 0px;\"><strong>Nh\u1eadn di\u1ec7n c\u00e1c \u0111\u1ec9nh k\u00eanh:<\/strong> S\u1eed d\u1ee5ng ch\u1ee9c n\u0103ng \u0111\u00e1nh d\u1ea5u (marker) c\u1ee7a OSA \u0111\u1ec3 \u0111\u1eb7t c\u00e1c d\u1ea5u l\u00ean c\u00e1c \u0111\u1ec9nh c\u1ee7a hai k\u00eanh li\u1ec1n k\u1ec1. OSA s\u1ebd t\u1ef1 \u0111\u1ed9ng hi\u1ec3n th\u1ecb b\u01b0\u1edbc s\u00f3ng (\u0111\u01a1n v\u1ecb nm) ho\u1eb7c t\u1ea7n s\u1ed1 (\u0111\u01a1n v\u1ecb GHz) t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed7i \u0111\u1ec9nh.<\/p><\/li>\n\n\n\n<li><p style=\"margin: 0px 0px 8px;\"><strong>T\u00ednh to\u00e1n kho\u1ea3ng c\u00e1ch:<\/strong> OSA th\u01b0\u1eddng t\u1ef1 \u0111\u1ed9ng t\u00ednh to\u00e1n s\u1ef1 ch\u00eanh l\u1ec7ch gi\u1eefa hai d\u1ea5u.<\/p>\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Theo b\u01b0\u1edbc s\u00f3ng (\u03bb):<\/strong> Tr\u1eeb b\u01b0\u1edbc s\u00f3ng c\u1ee7a k\u00eanh th\u1ee9 nh\u1ea5t kh\u1ecfi b\u01b0\u1edbc s\u00f3ng c\u1ee7a k\u00eanh th\u1ee9 hai (v\u00ed d\u1ee5: \u03bb\u2082 \u2013 \u03bb\u2081).<\/p><\/li>\n\n\n\n<li><p style=\"margin: 0px;\"><strong>Theo t\u1ea7n s\u1ed1 (f):<\/strong> Tr\u1eeb t\u1ea7n s\u1ed1 c\u1ee7a k\u00eanh th\u1ee9 hai kh\u1ecfi t\u1ea7n s\u1ed1 c\u1ee7a k\u00eanh th\u1ee9 nh\u1ea5t (v\u00ed d\u1ee5: f\u2081 \u2013 f\u2082). L\u01b0u \u00fd r\u1eb1ng t\u1ea7n s\u1ed1 v\u00e0 b\u01b0\u1edbc s\u00f3ng c\u00f3 m\u1ed1i quan h\u1ec7 ngh\u1ecbch \u0111\u1ea3o.<\/p><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><p style=\"margin: 0px;\"><strong>Ki\u1ec3m tra so v\u1edbi ti\u00eau chu\u1ea9n:<\/strong> So s\u00e1nh kho\u1ea3ng c\u00e1ch \u0111\u00e3 t\u00ednh (v\u00ed d\u1ee5: 0,8 nm ho\u1eb7c 100 GHz) v\u1edbi th\u00f4ng s\u1ed1 thi\u1ebft k\u1ebf c\u1ee7a h\u1ec7 th\u1ed1ng b\u1ea1n (l\u01b0\u1edbi ITU-T). S\u1ef1 ch\u1ec7ch l\u1ec7ch nh\u1ea5t qu\u00e1n cho th\u1ea5y kh\u1ea3 n\u0103ng x\u1ea3y ra s\u1ef1 c\u1ed1 v\u1edbi laser ho\u1eb7c c\u1ea5u h\u00ecnh h\u1ec7 th\u1ed1ng.<\/p><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\ud83d\udcdd Vai tr\u00f2 then ch\u1ed1t c\u1ee7a b\u1ed9 thu ph\u00e1t quang ch\u1ea5t l\u01b0\u1ee3ng cao<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"719\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/b8ab50daec0b4f14a21652b6b3f1b241.jpg\" alt=\"optical transceiver\" class=\"wp-image-4905\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/b8ab50daec0b4f14a21652b6b3f1b241.jpg 1200w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/b8ab50daec0b4f14a21652b6b3f1b241-300x180.jpg 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/b8ab50daec0b4f14a21652b6b3f1b241-1024x614.jpg 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/b8ab50daec0b4f14a21652b6b3f1b241-768x460.jpg 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/b8ab50daec0b4f14a21652b6b3f1b241-18x12.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a kho\u1ea3ng c\u00e1ch k\u00eanh DWDM b\u1eaft \u0111\u1ea7u t\u1eeb ngu\u1ed3n: b\u1ed9 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>optical transceiver<\/strong><\/a>. M\u1ed9t b\u1ed9 thu ph\u00e1t k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng tr\u00f4i b\u01b0\u1edbc s\u00f3ng l\u00e0 nguy\u00ean nh\u00e2n h\u00e0ng \u0111\u1ea7u g\u00e2y vi ph\u1ea1m kho\u1ea3ng c\u00e1ch k\u00eanh. Khi t\u00ecm hi\u1ec3u <strong>c\u00e1ch ch\u1ecdn b\u1ed9 thu ph\u00e1t DWDM SFP+ ph\u00f9 h\u1ee3p<\/strong>, t\u00ednh \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c l\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 b\u1eaft bu\u1ed9c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng y\u1ebfu t\u1ed1 c\u1ea7n l\u01b0u \u00fd khi ch\u1ecdn b\u1ed9 thu ph\u00e1t DWDM:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh b\u01b0\u1edbc s\u00f3ng:<\/strong> Ph\u1ea3i duy tr\u00ec b\u01b0\u1edbc s\u00f3ng quy \u0111\u1ecbnh trong su\u1ed1t d\u1ea3i nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng.<\/p><\/li>\n\n\n\n<li><p style=\"margin: 0px;\"><strong>\u0110\u1ed9 m\u00e9o pha th\u1ea5p (Low Chirp):<\/strong> Gi\u1ea3m thi\u1ec3u vi\u1ec7c m\u1edf r\u1ed9ng ph\u1ed5, v\u1ed1n c\u00f3 th\u1ec3 v\u00f4 t\u00ecnh x\u00e2m nh\u1eadp v\u00e0o c\u00e1c k\u00eanh li\u1ec1n k\u1ec1.<\/p><\/li>\n\n\n\n<li><p style=\"margin: 0px;\"><strong>T\u1ef7 s\u1ed1 t\u00edn hi\u1ec7u tr\u00ean nhi\u1ec5u quang (OSNR) cao:<\/strong> T\u1ef7 s\u1ed1 t\u00edn hi\u1ec7u tr\u00ean nhi\u1ec5u t\u1ed1t l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ec3 ph\u00e1t hi\u1ec7n t\u00edn hi\u1ec7u r\u00f5 r\u00e0ng.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea7u t\u01b0 v\u00e0o c\u00e1c th\u00e0nh ph\u1ea7n ch\u1ea5t l\u01b0\u1ee3ng cao, ch\u1eb3ng h\u1ea1n nh\u01b0 nh\u1eefng s\u1ea3n ph\u1ea9m t\u1eeb c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t uy t\u00edn, l\u00e0 h\u00e0ng ph\u00f2ng th\u1ee7 \u0111\u1ea7u ti\u00ean nh\u1eb1m duy tr\u00ec s\u1ef1 c\u0103n ch\u1ec9nh k\u00eanh \u0111\u00fang. V\u00ed d\u1ee5, \u0111\u1ea3m b\u1ea3o r\u1eb1ng <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/buy-dwdm.htm\"><strong>b\u1ed9 thu ph\u00e1t DWDM SFP+<\/strong><\/a><strong> t\u01b0\u01a1ng th\u00edch<\/strong> v\u1edbi c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng hi\u1ec7n c\u00f3 c\u1ee7a b\u1ea1n s\u1ebd ng\u0103n ng\u1eeba nhi\u1ec1u v\u1ea5n \u0111\u1ec1 v\u1ec1 hi\u1ec7u n\u0103ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u0110\u1ea3m b\u1ea3o t\u00ednh \u1ed5n \u0111\u1ecbnh d\u00e0i h\u1ea1n v\u1edbi b\u1ed9 thu ph\u00e1t LINK-PP<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi k\u1ef9 s\u01b0 m\u1ea1ng kh\u00f4ng th\u1ec3 ch\u1ea5p nh\u1eadn th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, vi\u1ec7c h\u1ee3p t\u00e1c v\u1edbi nh\u00e0 cung c\u1ea5p \u0111\u00e1ng tin c\u1eady l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac hi\u1ec7u n\u0103ng c\u1ee7a <strong>transceiver quang h\u1ecdc LINK-PP<\/strong> t\u1ecfa s\u00e1ng. \u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ed9 ch\u00ednh x\u00e1c b\u01b0\u1edbc s\u00f3ng v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t v\u01b0\u1ee3t tr\u1ed9i, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.link-pp.com\/\"><strong>LINK-PP<\/strong><\/a> c\u00e1c module LINK-PP \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng nh\u1eb1m kh\u00f3a ch\u00ednh x\u00e1c v\u00e0o l\u01b0\u1edbi ITU.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, <strong>B\u1ed9 thu ph\u00e1t LINK-PP 10G DWDM SFP+ LC 40 km (M\u00e3 model: <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-27047-10g-cwdm-dwdm-sfp.htm?ca=1591,1595&amp;cv=8847,8873\"><strong>LP-DWxx10-40I<\/strong><\/a><strong>)<\/strong> l\u00e0 l\u1ef1a ch\u1ecdn tuy\u1ec7t v\u1eddi cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi cao. Ph\u1ea7n \u2018xx\u2019 trong m\u00e3 m\u00f4 h\u00ecnh t\u01b0\u01a1ng \u1ee9ng v\u1edbi k\u00eanh ITU-T c\u1ee5 th\u1ec3 (v\u00ed d\u1ee5: \u201c39\u201d ngh\u0129a l\u00e0 CH39 \u1edf b\u01b0\u1edbc s\u00f3ng 1546,12 nm), \u0111\u1ea3m b\u1ea3o s\u1ea3n ph\u1ea9m \u0111\u00e1p \u1ee9ng ngay l\u1eadp t\u1ee9c c\u00e1c y\u00eau c\u1ea7u nghi\u00eam ng\u1eb7t v\u1ec1 kho\u1ea3ng c\u00e1ch k\u00eanh s\u1ee3i quang ngay t\u1eeb khi xu\u1ea5t x\u01b0\u1edfng. Vi\u1ec7c s\u1eed d\u1ee5ng th\u00e0nh ph\u1ea7n \u0111\u1ed9 ch\u00ednh x\u00e1c cao nh\u01b0 v\u1eady gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c \u0111o l\u01b0\u1eddng v\u00e0 b\u1ea3o tr\u00ec kho\u1ea3ng c\u00e1ch k\u00eanh s\u1ee3i quang c\u1ee7a b\u1ea1n, v\u00ec b\u1ed9 thu ph\u00e1t t\u1ef1 n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t \u0111i\u1ec3m tham chi\u1ebfu \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\ud83d\udcdd K\u1ebft lu\u1eadn: \u0110\u1ed9 ch\u00ednh x\u00e1c l\u00e0 y\u1ebfu t\u1ed1 h\u00e0ng \u0111\u1ea7u<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110o kho\u1ea3ng c\u00e1ch k\u00eanh s\u1ee3i quang kh\u00f4ng ph\u1ea3i l\u00e0 nhi\u1ec7m v\u1ee5 th\u1ef1c hi\u1ec7n m\u1ed9t l\u1ea7n duy nh\u1ea5t m\u00e0 l\u00e0 m\u1ed9t ph\u1ea7n thi\u1ebft y\u1ebfu c\u1ee7a <strong>gi\u00e1m s\u00e1t t\u00ecnh tr\u1ea1ng s\u1ee9c kh\u1ecfe m\u1ea1ng quang<\/strong>. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u00e1y ph\u00e2n t\u00edch ph\u1ed5 quang (OSA) m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c v\u00e0 hi\u1ec3u r\u00f5 vai tr\u00f2 then ch\u1ed1t c\u1ee7a c\u00e1c b\u1ed9 thu ph\u00e1t \u1ed5n \u0111\u1ecbnh, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o m\u1ea1ng c\u1ee7a m\u00ecnh cung c\u1ea5p hi\u1ec7u su\u1ea5t cao v\u00e0 \u0111\u1ed9 tin c\u1eady m\u00e0 doanh nghi\u1ec7p c\u1ee7a b\u1ea1n ph\u1ee5 thu\u1ed9c v\u00e0o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba, gi\u00fap b\u1ea1n tr\u00e1nh \u0111\u01b0\u1ee3c vi\u1ec7c x\u1eed l\u00fd s\u1ef1 c\u1ed1 m\u1ea1ng ph\u1ee9c t\u1ea1p v\u1ec1 sau.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\ud83d\udcdd C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 bi\u1ebft kho\u1ea3ng c\u00e1ch k\u00eanh c\u1ee7a b\u1ea1n c\u00f3 \u0111\u00fang hay kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y xem b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a h\u1ec7 th\u1ed1ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch \u0111\u00fang. S\u1eed d\u1ee5ng m\u00e1y ph\u00e2n t\u00edch ph\u1ed5 quang \u0111\u1ec3 ki\u1ec3m tra kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111\u1ec9nh. N\u1ebfu c\u00e1c gi\u00e1 tr\u1ecb \u0111o \u0111\u01b0\u1ee3c kh\u1edbp v\u1edbi b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, th\u00ec kho\u1ea3ng c\u00e1ch k\u00eanh c\u1ee7a b\u1ea1n l\u00e0 ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nh\u1eefng c\u00f4ng c\u1ee5 n\u00e0o \u0111\u1ec3 \u0111o kho\u1ea3ng c\u00e1ch k\u00eanh?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng m\u00e1y ph\u00e2n t\u00edch ph\u1ed5 quang. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 t\u00ednh to\u00e1n th\u1ee7 c\u00f4ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c con s\u1ed1 trong b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt. M\u1ed9t s\u1ed1 ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng c\u0169ng c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3. M\u1ed7i c\u00f4ng c\u1ee5 x\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch theo c\u00e1ch ri\u00eang c\u1ee7a n\u00f3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ea1i sao kho\u1ea3ng c\u00e1ch k\u00eanh l\u1ea1i quan tr\u1ecdng trong c\u00e1c h\u1ec7 th\u1ed1ng DWDM?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng c\u00e1ch k\u00eanh ng\u0103n c\u00e1c t\u00edn hi\u1ec7u tr\u1ed9n l\u1eabn v\u00e0o nhau. N\u1ebfu c\u00e1c k\u00eanh qu\u00e1 g\u1ea7n nhau, t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 b\u1ecb tr\u1ed9n v\u00e0 g\u00e2y ra l\u1ed7i. Kho\u1ea3ng c\u00e1ch ph\u00f9 h\u1ee3p gi\u00fap m\u1ea1ng c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 ng\u0103n ch\u1eb7n nhi\u1ec5u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u1ea1n c\u00f3 th\u1ec3 \u0111o kho\u1ea3ng c\u00e1ch k\u00eanh m\u00e0 kh\u00f4ng c\u1ea7n m\u00e1y ph\u00e2n t\u00edch ph\u1ed5 quang hay kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3, b\u1ea1n ho\u00e0n to\u00e0n c\u00f3 th\u1ec3. H\u00e3y s\u1eed d\u1ee5ng c\u00e1c gi\u00e1 tr\u1ecb t\u1ea7n s\u1ed1 ho\u1eb7c b\u01b0\u1edbc s\u00f3ng t\u1eeb b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n. L\u1ea5y gi\u00e1 tr\u1ecb n\u00e0y tr\u1eeb \u0111i gi\u00e1 tr\u1ecb li\u1ec1n k\u1ec1 \u0111\u1ec3 t\u00ednh ra kho\u1ea3ng c\u00e1ch k\u00eanh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u1ea1n n\u00ean l\u00e0m g\u00ec n\u1ebfu kho\u1ea3ng c\u00e1ch k\u00eanh \u0111o \u0111\u01b0\u1ee3c kh\u00f4ng kh\u1edbp v\u1edbi b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc ti\u00ean, h\u00e3y ki\u1ec3m tra xem thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang ch\u01b0a. L\u00e0m s\u1ea1ch t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ea7u n\u1ed1i. \u0110\u1ea3m b\u1ea3o b\u1ea1n \u0111ang \u00e1p d\u1ee5ng \u0111\u00fang ph\u01b0\u01a1ng ph\u00e1p \u0111o. N\u1ebfu v\u1eabn g\u1eb7p kh\u00f3 kh\u0103n, h\u00e3y li\u00ean h\u1ec7 nh\u00e0 cung c\u1ea5p thi\u1ebft b\u1ecb \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>\u0110o kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c k\u00eanh quang h\u1ecdc b\u1eb1ng m\u00e1y ph\u00e2n t\u00edch, t\u00ednh to\u00e1n th\u1ee7 c\u00f4ng ho\u1eb7c c\u00f4ng c\u1ee5 ph\u1ea7n m\u1ec1m \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng ch\u00ednh x\u00e1c v\u00e0 kh\u00f4ng g\u00e2y nhi\u1ec5u.<\/p>","protected":false},"author":1,"featured_media":4903,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[26],"class_list":["post-4906","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\/4906","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=4906"}],"version-history":[{"count":3,"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/posts\/4906\/revisions"}],"predecessor-version":[{"id":7709,"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/posts\/4906\/revisions\/7709"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/media\/4903"}],"wp:attachment":[{"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/media?parent=4906"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/categories?post=4906"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resources.l-p.com\/vi\/wp-json\/wp\/v2\/tags?post=4906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}