由光探测器和前置放大器组成的光接收机前端将经过传输通道后发生了衰减和畸变的微弱光信号转变为电压信号并初步放大,是光通信系统的关键环节。相对于混合集成,单片集成将光探测器和前置放大器制作在同一衬底上,二者通过空气桥相连,可以最大程度地减小芯片间互连寄生参数的影 The optical receiver front-end composed of photodetector and preamplifier transforms the feeble optical signal attenuated and distorted after passing through the transmission channel into a voltage signal and initially amplified, which is a key part of the optical communication system. Compared to hybrid integration, monolithic integration of the photodetector and preamplifier fabricated on the same substrate, the two connected by the air bridge, you can minimize the influence of inter-chip interconnect parasitic parameters