一种新型超宽带光电探测模块的研究

A novel ultra-broadband photoelectric detection module

为了满足光电探测系统的高速应用,采用了一种新型超宽带光电检测模块的设计方法,即在传统的光电转换基础上联合现代微波集成电路技术,通过同时采集PIN光电二极管阴极和阳极光电流,用两组不同带宽范围的放大器放大,最后用连续通带的双工器将信号合并,得到一种超宽带(直流～4GHz)、高响应度(4900V/W)的光电探测模块。结果表明,该方法不但获得了超宽带宽的光电探测模块,还解决了常见高速光电检测模块无法检测直流甚至一些低频光信号的问题。

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.