GrenTech 25G SFP28 CWDM adopts a DFB laser without refrigeration CWDM at the TX end and a PIN receiver at the RX end. It can trasmint up to 10km over single-mode optical fiber. The 25G SFP electrical and mechanical structure is in line with SFF-8431 and SFF-8432. It is mainly uses in 5G front-haul and 25G Ethernet. Contact GrenTech for more 25g cwdm info!