Accelight AQP40C-C-LR optical transceiver is designed for 40G Ethernet links over 10km single mode fiber. It is compliant with QSFP+ Multi-Source Agreement (MSA), CWDM4 MSA and IEEE 802.3ba. The transmitter integrates 4- directly modulated Distributed Feedback Laser (DFB) with center wavelength of 1271 nm, 1291nm, 1311nm and 1331 nm. The 4 optical signals are multiplexed into one single mode fiber for 40Gbps optical transmission. On the receive side, the four lanes of optical data streams are optically de-multiplexed into 4 10G CWDM channels and each data channel is recovered by a PIN photo-detector and trans-impedance amplifier. It’s a hot pluggable module with a serial EEPROM that allows the user to access the monitoring and configuration data via a Two Wire Serial interface (I2C).