Fused-silica recessed lens is a micro lens array product developed by SUNA-opto for multi-channel optical coupling scenarios. It is prepared by lithography-etching / nanoimprint-etching process, which can realize high-precision recessed cylindrical lens structure, support customized array channel number, and adapt to the multi-channel light field shaping and coupling requirements of optical transceiver, CPO Application, WSS Application and other scenarios.