Gigaopto's 200G QSFP28-DD (Quad Small Form Factor Pluggable Double Density) series of optical transceivers support the demands of an evolving technology environment and optimize optical link applications, such as Telecom Metro, Telecom Core, Wireless Backhaul and Data Center Interconnect (DCI). They are compliant with the QSFP-DD MSA. Digital diagnostics functions are available via the I2C interface, as specified by the QSFP-DD MSA. This portfolio includes SR8 100m, FR4 2km, FR4-10/LR4 10km and ER4 40km, etc. The optical transceiver is RoHS compliant.