TKQSFP-40G-ER4 40Gbps CWDM 40KM QSFP+ Optical Transceiver

This product strictly applies to 40GBASE-ER4 of the IEEE P802.3ba standard. it is a transceiver module designed for 40km optical communication applications.

The module transforms 4 x 10Gb/s input channels to 4 CWDM optical signals, and multiplexes the channels into one channel for 40Gb/s optical transmission. While on the receiver side, just backward rehearsal the procedures, like turn 40Gb/s optical transmission input into 4 CWDM optical signals, and finally convert them to 4 channel output electrical data.

According to wavelength grid defined in ITU-T G694.2, the central wavelengths of the CWDM channels, mainly are 1271, 1291, 1311 and 1331nm. It has a duplex LC connector for the optical interface, and for for the electrical interface it also has a 148-pin connector. Apply single-mode fiber (SMF) in this module is necessary as to minimize the optical dispersion in the long-haul system.

The product meets QSFP Multi-Source Agreement (MSA). It can withstand harshest external operating conditions, such extreme temperature, humidity and EMI interference.

For more details, pls feel free to contact us.

Share to:


  • Transmission data rate up to 11.2Gbps per channel
  • QSFP+ MSA compliant
  • Compliant to IEEE 802.3ba specification for 40GBASE-ER4 links
  • 4 CWDM un-cooled DFB lasers, using ITU G.694.2 wavelength grid at 1271, 1291, 1311 and 1331nm
  • High Sensitivity APD-TIA with optical DEMUX
  • Up to 40km reach over standard single mode fiber
  • Hot pluggable electrical interface
  • Operating case temperature 0°C to +70°C
  • 3V power supply
  • RoHS 6 compliant (lead free)


Widely used in data center 40GBASE-ER4 Ethernet links, transmission distances of up to 40km via standard single mode fiber supports OTU3, OTU3e1, OTU3e2 multiplexing and demultiplexing tests.

Scroll to Top