Transmitter-Receiver Optical Sub Assembly using Ultra-Compact Tunable DBR/Ring Laser

We demonstrate a tiny optical module which integrates an ultra-compact wavelength tunable laser, InP-based transmitter and PLC-based receiver. The optical module exhibits low-insertion loss (<13.6 dB) and high bandwidth (>45 GHz) for ≥400-Gb/s coherent-optical links.