Technical specifications

The 1.25G CWDM-18 SFP Optical Transceiver Module is a high-performance Gigabit optical transceiver designed for CWDM (Coarse Wavelength Division Multiplexing) transmission systems. Operating at CWDM Channel 18 (1610nm) with a data rate of 1.25Gbps, it supports transmission distances of up to 40km over Single Mode Fiber (SMF).

Built with a standard hot-pluggable SFP form factor, the module features a Duplex LC optical interface and is fully compatible with Gigabit Ethernet switches, routers, OLTs, media converters, and CWDM transport equipment. It utilizes a DFB laser transmitter and APD receiver to provide excellent optical performance, low power consumption, and high receiver sensitivity for long-distance communication.

Compliant with IEEE 802.3z and SFP MSA standards, the module also supports optional Digital Diagnostic Monitoring (DDM/DOM), allowing real-time monitoring of voltage, temperature, transmit power, receive power, and laser bias current. CWDM SFP modules are available across the ITU-T CWDM wavelength grid from 1270nm to 1610nm, with Channel 18 corresponding to 1610nm.

Product Features

• Supports 1.25Gbps Gigabit Ethernet
• CWDM Channel 18 (1610nm) wavelength
• Up to 40km transmission over Single Mode Fiber
• Standard SFP hot-pluggable package
• Duplex LC optical connector
• High-performance DFB laser transmitter
• High-sensitivity APD receiver
• Optional DDM/DOM digital diagnostics
• Low power consumption and excellent reliability
• Compliant with IEEE 802.3z and SFP MSA
• Compatible with Huawei, Cisco, ZTE, Juniper, FiberHome, Nokia and other standard networking equipment

  Attribute	Specification
  Product Name	1.25G CWDM-18 SFP Optical Transceiver
  Form Factor	SFP
  Data Rate	1.25Gbps
  Ethernet Standard	1000BASE-EX CWDM
  CWDM Channel	CWDM-18
  Center Wavelength	1610nm
  Fiber Type	Single Mode Fiber (SMF)
  Transmission Distance	40km
  Optical Connector	Duplex LC
  Transmitter	DFB Laser
  Receiver	APD Photodiode
  Optical Budget	≥19dB
  Power Supply	3.3V
  Power Consumption	≤1W
  DDM/DOM	Optional
  Hot Pluggable	Yes
  Operating Temperature	0°C to +70°C
  Industrial Temperature	-40°C to +85°C (Optional)
  Compliance	IEEE 802.3z, SFP MSA
  Certifications	CE, FCC, RoHS
  Applications	CWDM Network, Metro Network, Gigabit Ethernet, Telecom, OLT, Switch, Router, Data Center