FTL4C1QE2C QSFP+ transceiver modules are designed for use in 40 Gigabit Ethernet links over single mode fiber. They are compliant with the QSFP+ MSA1,2 and IEEE 802. These FTL4C1Q modules feature power dissipation of <3. 3V power supply, and an uncooled 4x10Gb/s CWDM transmitter. GIGALIGHT provides 100G, 200G, and 400G pluggable digital coherent optical transceiver modules (DCO) for data center interconnection (DCI), 5G backhaul, metro telecommunication, and other long-haul transmission networks.