A 4 × 25.8-Gbps −13.7-dBm sensitivity optical receiver with <0.3 dB crosstalk penalty for 100-G short-reach application

A 4 × 25.8-Gb/s -13.7-dBm sensitivity optical receiver composed of a 0.13-μm SiGe BICMOS transimpedance amplifier and an 850-nm 250μm-pitch photodiode is demonstrated. The crosstalk penalty is less than 0.3 dB for all channels.