C-LIGHT telephone TEL:+86 132 6656 7067    
Language
C-LIGHT search

40G CWDM4 QSFP+ ER4 40km Transceiver

By C-LIGHT Marketing 丨 Sep 17, 2025
Table of Contents

    40G CWDM4 QSFP+ ER4 40km optical module utilizes 4-channel CWDM wavelength multiplexing technology, supporting 40Gbps data rates and transmission over 40km of single-mode fiber. It is suitable for data center interconnects, 5G communications, and metropolitan area networks, providing a low-power, high-reliability solution. Compatible with mainstream switch brands, it meets enterprise-level network expansion requirements.

    0℃~70℃丨TX:-1~4.5dBm 丨 RX:<-19dbm丨

    < 3.5W  丨Factory warranty 丨


    CLQSFP40GER4

    40G-QSFP+LR-10km.jpg

    ●Hot-pluggable QSFP+ form factor

    ●Supports 41.3 Gb/s aggregate bit rate

    ●Power dissipation < 3.5W

    ●18.5 dB link insertion loss budget

    ●RoHS-6 compliant

    ●Commercial case temperature range 0°C to 70°C

    ●Single 3.3V power supply

    ●Maximum link length of 40km on Single Mode Fiber (SMF)

    ●Uncooled 4x10Gb/s CWDM transmitter + APD Receiver

    ●XLPPI electrical interface

    ●Duplex LC receptacles

    ●Built-in digital diagnostic functions, including Tx/Rx power monitoring


    Specification

    Part Number

    CLQSFP40GER4

    Vendor

    C-LIGHT

    Form Factor

    QSFP+

    Data Rate

    40Gbps

    Wavelength

    1310nm

    Distance

    40km

    Connector

    Duplex LC

    Media

    SMF

    Transmitter Type

    DFB CWDM

    Receiver Type

    APD

    TX Power

    -1~4.5dBm

    Receiver Sensitivity

    < -19dBm

    Power Budget

    18dB

    Receiver Overload

    >-5dBm

    Typical Power Consumption

    ≤3.5W

    Extinction Ratio

    >5.5dB

    DDM/DOM

    Supported

    Ind.Temperature Range

    0 to 70°C

    Protocols

    OTN OTU3, 40G Ethernet, Fiber Channel, SATA/SAS3, MSA Compliant

    Warranty

    3 Years


    Specification
    40G-QSFP+ER-40km-Transceiver.jpg40G-QSFP+ER-40km-test.jpg

    40G-QSFP+ER-40km-DDM.png

    Test video

    Related Products

    Part Number

    CLQSFP40GER4

    CLQSFP40GLR4

    Center Wavelength1310nm1310nm
    ConnectorDuplex LCDuplex LC
    Cable Distance (Max.)40km10km
    ModulationDFB CWDMDFB CWDM
    Power ConsumptionSMFSMF
    TX Power-1~4.5dBm-7~5dBm
    Receiver Sensitivity< -19dBm

    < -13dBm

    Receiver Overloa>-5dBm>3dBm
    Extinction Ratio>5.5dB>4dB


    Application Graph

    40G-QSFP+ER-40km-application.jpg

    For any questions, please contact us by email or WhatsApp.

    Email: sales@c-light.com

    WhatsApp: +86 132 6656 7067

    Related Articles

    Call
    Top