A novel ultra-broadband photoelectric detection module

For the high-speed optoelectronic systems applications,a new method of design an ultra-broadband optical detection module was introduced.It combines the traditional photoelectric with modern monolithic microwave integrated circuit technology.By collecting the cathode and anode photo currents of the PIN photodiode simultaneously,they were amplified by two amplifier circuits with different bandwidth range.Finally,the two different channel signals were combined by a consecutive pass-band diplexer.As a result,an ultra-broadband(direct-current~4GHz) and high responsivity(4900V/W) photoelectric detection module was obtained.This module solves the problem that any direct-current signal even low low-frequency optical signal can't be detected in a common high-speed optical detection module.