Como Identificar Comprimentos de Onda de Transceptores Ópticos Pela Cor da Alavanca？

In the field of fiber optic networking, identifying the right transceiver quickly is essential to maintain high performance and avoid installation errors. One key method of visual identification is the color of the transceiver’s pull tab, which corresponds to its comprimento de onda. This article provides a professional guide on transceiver pull tab color codes by wavelength—spanning SFP, SFP+, CWDM, and BiDi modules—and introduces how LINK-PP standardizes color matching across its optical product lines.

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🔍 Why Wavelength Matters in Optical Modules

Every optical transceiver operates at a specific comprimento de onda, typically measured in nanometers (nm). Matching the correct wavelength with the right fiber type and application is essential to ensure:

• (crítico para módulos 400G+)

• Distância de transmissão

• Compatibility with other equipment (like multiplexers in WDM systems)

1️⃣ Standard SFP Wavelengths and Pull Tab Colors

The most commonly used SFP optical modules operate at 850nm, 1310nm, 1490nm, and 1550nm. Their pull tab colors help quickly distinguish between module types and supported transmission distances.

Comprimento de onda	Aplicação	Pull Tab Color
850nm	Gigabit SX	Preto
1310 nm	LX/SMF / Fast Ethernet	Azul
1490nm	GPON / BiDi	Purple
1550 nm	Long Distance	Yellow
1550nm ≥ 80KM	Ultra Long Haul	Verde

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2️⃣ CWDM Transceiver Color Coding

CWDM (Multiplexação por Divisão de Comprimento de Onda Grossa) modules use 18 different wavelengths between 1270nm and 1610nm, each with a unique pull ring color for easy identification.

Comprimento de onda	Pull Ring Color	Comprimento de onda	Pull Ring Color
1270nm	Gray	1470nm	Gray
1290nm	Gray	1490nm	Purple
1310 nm	Gray	1510nm	Azul
1330nm	Purple	1530nm	Verde
1350nm	Azul	1550 nm	Yellow
1370nm	Verde	1570nm	Laranja
1390nm	Yellow	1590nm	Red
1410nm	Laranja	1610nm	Brown
1430nm	Red
1450nm	Brown

This color coding enables fast troubleshooting and port mapping in complex CWDM networks.

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3️⃣ 10G Dual Fiber SFP+ Modules

10G dual-fiber optical modules typically use three key wavelengths, each with different transmission ranges and corresponding pull tab colors.

Comprimento de onda	Distância	Pull Ring Color
850nm	Alcance curto	Preto
1310 nm	10–40 KM	Azul
1550nm (40 KM)	Medium Distance	Red
1550nm (80 KM)	Long Distance	White

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4️⃣ 10G BiDi Modules (Single Fiber)

BiDi (Bidirectional) optical modules transmit and receive on a single fiber using different wavelengths for each direction.

Tx Wavelength	Pull Tab Color
1270nm	Preto
1330nm	Azul
1490nm	Purple
1550 nm	Yellow

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5️⃣ LINK-PP Transceiver Pull Tab Color Reference

LINK-PP offers a full range of compatible SFP/SFP+ transceivers with strict adherence to industry-standard color coding. Below are commonly used modules and their pull tab colors:

SFP/SFP+ Dual-Fiber Modules

Tipo de Módulo	Comprimento de onda	Pull Tab Color
SFP ZX	1550nm 80KM	Verde
SFP+ ZR	1550nm 80KM	White
SFP EX	1550nm 40KM	Yellow
SFP+ ER	1550nm 40KM	Red
SFP LX, LHX	1310nm 20/40KM	Azul
SFP SX	850nm 550M	Preto
100Mbps SMF	1310nm 10/20/40KM	Azul
100Mbps MMF	1310nm 2KM	Preto

SFP/SFP+ BiDi Modules

Tx Wavelength	Pull Tab Color
1490nm	Purple
1550 nm	Yellow
1310 nm	Azul
1330nm	Azul
1270nm	Preto

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✅ Why Choose LINK-PP?

With over 20 years of experience in optical communication, LINK-PP delivers high-quality transceivers with consistent labeling and color standards. Whether you need BiDi modules for metro access or CWDM for dense wavelength deployments, LINK-PP ensures compatibility, performance, and ease of identification.

🔗 Explore our full product catalog at www.l-p.com