Taiwan-based FIBERSTAMP recently introduced a 200G QSFP56 ER4 optical transceiver with a 40km reach.
FIBERSTAMP says its new product uses a 4-lane WDM optical engine architecture, which integrates 4-lane cooled EML TOSA, APD ROSA and 50G PAM4 CDR based on DSP technology. The transceiver complies with the QSFP MSA standard, supports IEEE 802.3cn 200GBASE-ER4 Ethernet and OTN protocols, and supports a maximum transmission distance of 40km, well applicable for 200G long-distance metro DCI and 5G backhaul.