40G QSFP+ ER4 DML CWDM4 40km Optical Transceiver

GIGALIGHT 40G QSFP+ ER4 optical transceiver module is designed for long-distance interconnections in data centers. It complies with the IEEE 802.3bm 40GBASE-ER4 Ethernet transmission protocol and supports both 40GE and OTU3 dual-rate applications, which features an integrated pair of multiplexers (MUX) and demultiplexers (DEMUX), with each channel operating at a center wavelength of 1271nm, 1291nm, 1311nm, and 1331nm respectively. It utilizes a pair of single-mode fibers for transmission, allowing for a maximum reach of 40km.


  • 4-channel full-duplex transceiver module in QSFP+ hot-pluggable form factor
  • 4 channels of non-cooled CWDM DML and high-sensitivity APD ROSA
  • Compliant with QSFP+ MSA and IEEE 802.3bm 40GBASE-ER4 and OTN OTU3 transmission protocols
  • Supports transmission rates up to 39.8Gbps to 44.6Gbps
  • Utilizes single-mode fiber for transmission, with a maximum reach of 40km (link loss budget of 18.5dB)
  • Power consumption of less than 3.5W
  • Dual LC optical connectors
  • Designed for commercial-grade operating temperature range
  • Operates at a voltage of 3.3V
  • Compliant with RoHS environmental standards (lead-free)
Product Model Product Description
GQS-SPO400-ER4C 40GE/OTU3 QSFP+ ER4 DML CWDM4 40km Optical Transceiver Module

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