FTLQ1381N7NL 40G CFP transceiver modules are designed for use in 40 Gigabit links required for router to router client side applications or uplink interconnections to transport networks.
The Finisar FTLQ8181EBLM 40GBASE-SR4 40G Ethernet transceiver is a Duplex CFP transceiver for optical communications, rated for distances up to 100m and a maximum bandwidth of 40Gbps.