QSFP-40G-ER4 Duplex LC 40GBASE-ER4 40G 40km QSFP+ ER4

The 40G QSFP ER4 optical transceiver integrates the transmit and receive path onto one module. Four electric-absorption modulated lasers (DFBs) with 1270~1330nm center wavelengths, which multiplexed/demutiplexed into a single-mode fiber through an industry-standard LC connector. Each data steam is recovered by a PIN photodetector and transimpedance amplifier, retimed, and passed on to an output driver.