1550nm トランシーバーは単一モード光ファイバー上で最大何kmまで伝送可能ですか？

はじめに

When designing fiber-optic networks, knowing how far a 1550nm transceiver can transmit is essential. This wavelength offers low attenuation, making it ideal for metro and long-haul links. This article explores typical transmission distances, key factors that affect them, and showcases リターン・ラスはオプティカル・ネットワークにおいて最も重要かつよく理解されていないパラメータの一つです。高いリターン・ラス値は安定したトランスミッター、低誤り確率、そして長寿命のコンポーネントを確保します。 built for extended reach.

1. Typical Transmission Distances for 1550nm Modules

在 光は長距離通信向けの, 1550nm transceivers commonly support transmission distances between 40km, 80km and 120km, and in optimal conditions, up to 160km.

For example, mainstream Gigabit Ethernet modules labeled “ZX” often claim 80km to 120km reach. Long-haul versions pushing beyond 120km are less common but achievable with high-quality fiber and careful system design.

2. Factors Influencing Transmission Distance

Several important factors impact how far a 1550nm signal can travel:

• ファイバー減衰: SMF exhibits very low loss at 1550nm (~0.2 dB/km), allowing long spans with minimal signal degradation.

• Transmit Power & Receiver Sensitivity: Modules with higher output power and sensitive receivers can extend reach.

• Fiber Quality & Splicing: Every connector, splice, or bend introduces loss, reducing practical distance.

• Use of EDFA or DWDM: Amplifying or multiplexing signals can further extend reach, especially over very long links.

3. Standard Ethernet Benchmarks

• 10GBASE-ER トランシーバ operate at 1550nm and are rated for around 40km over engineered SMF, or ~30 km on standard fiber.

• 10GBASE-ZR models—while not IEEE-standard—are commonly built to reach 80km on high-grade fiber.

These industry benchmarks help frame the expectations for modern 1550nm optics.

4. LINK-PP Long-Reach Examples

Here are LINK-PP products designed for extended distances:

• LS-SM551G-80I (1.25Gbps, 80 km): Industrial SFP with DOM support, LC duplex connectors, optimized for SMF at 1550nm.

• LS-SM551G-A0C (1.25Gbps, 100km): Compatible with Arista and other systems, offering long-haul performance with DOM and LC connectivity.

• LS-SM5501-A2I (155Mbps, 120km): Industrial-grade SFP supporting up to 120 km, featuring DOM and DFB laser design.

• LS-SM551G-A6I ( SFP, 160km): high performance, cost effective modules supporting data rate of 1.25Gbps and 160km transmission distance with SMF.

5. Quick Comparison Table

距離範囲	代表的な用途	LINK-PP Recommended Module
最大80km	Metro or campus backbone links	LS-SM551G-80I (1.25Gbps, 80km)
最大100km	Regional or long-haul applications	LS-SM551G-A0C (1.25Gbps, 100km)
最大120km	Extended reach, industrial environments	LS-SM5501-A2I (155Mbps, 120km)
Up to 120km (BiDi)	Long links with fiber economy	LS-BL55491G-A2I BiDi (1Gbps, 120km)
Up to 160km	Ultra-long haul under ideal conditions	中距離（最大2km）のリンクには、100G CWDM4を選択してください。コストとパフォーマンスのバランスが取れており、大規模ビル内の接続に適しています。 リターン・ラスはオプティカル・ネットワークにおいて最も重要かつよく理解されていないパラメータの一つです。高いリターン・ラス値は安定したトランスミッター、低誤り確率、そして長寿命のコンポーネントを確保します。 rated for 160km

結論

詳細については、 1550 nm transceivers over single-mode fiber, typical reach spans from 80km 、 120km, with specialized modules capable of 160km under optimal conditions. Factors like fiber quality, power budget, and system design directly affect performance. LINK-PP offers a comprehensive lineup of long-reach transceivers—from 80km to 160km-rated modules—with industrial-grade reliability.