A Hybrid-Integrated 400G TROSA Module Using Chip-to-Chip Optical Butt-Coupling

Using an optical butt-coupling method, we have developed a low-cost hybrid-integrated 4×100G TROSA module, showing clear Tx optical eye patterns and Rx sensitivities within −7.0 ~ −6.4 dBm at 106-0bps PAM4 signals for all channels.