optical fiber sfp module
QSFP+ 40G LR4 1310nm 10km LC DDM
June 6, 2022

QSFP+ 40G ER4 1310nm 40km LC DDM

40Gb/s QSFP+ 40km Transceiver

– 4 CWDM lanes Mux/Demux design
– Up to 11.1Gbps Data rate per wavelength
– Up to 40km transmission on SMF
– Electrically hot-pluggable
– Digital Diagnostics Monitoring Interface
– Compliant with QSFP+ MSA with LC connector
– Case operating temperature range:0°C to 70°C
– Power dissipation < 3.5 W


– 40G Ethernet
–  Data Center and LAN

– Compliant to IEEE 802.3ba
– Compliant to SFF-8436
– RoHS Compliant.

General Description
YXF-QP-S31L-40D is designed to operate over single-mode fiber system using 4X10 CWDM channel in
1310 band and links up to 40km. The module converts 4 inputs channel of 10Gb/s electrical data to 4
CWDM optical signals, and multiplexes them into a single channel for 40Gb/s optical transmission. Reversely, on the receiver side, the module optically de-multiplexes a 40Gb/s input into 4 CWDM
channels signals, and converts them to 4 channel output electrical data. The central wavelengths of the 4 CWDM channels are 1271, 1291, 1311 and 1331 nm. It contains a
duplex LC connector for the optical interface and a 38-pin connector for the electrical interface. Single- mode fiber (SMF) is applied in this module. This product converts the 4-channel 10Gb/s electrical input
data into CWDM optical signals (light), by a 4-wavelength Distributed Feedback Laser (DFB) array. The 4
wavelengths are multiplexed into a single 40Gb/s data, propagating out of the transmitter module via
the SMF. The receiver module accepts the 40Gb/s optical signals input, and de-multiplexes it into 4
CWDM 10Gb/s channels. Each wavelength light is collected by a discrete photo diode, and then
outputted as electric data after amplified by a TIA. The product is designed with form factor, optical/electrical connection and digital diagnostic interface
according to the QSFP+ Multi-Source Agreement (MSA) and compliant to 40G QSFP+ ER4 of IEEE