探测器及其噪声模型研究进展

Development of detectors and their noise models

无线光通信系统中,接收端由光电探测器实现光电转换,而探测器中存在的噪声会直接影响光电转换效率。文章以无线光通信为背景,根据光电探测器噪声的产生机理,对探测器的散粒噪声、产生-复合噪声、1/f噪声和热噪声分进行描述,并且给出相对应的数学模型。结合具体的雪崩光电探测器、正本征负探测器、光电倍增管、四象限探测器、量子点红外探测器、平衡探测器及双平衡探测器分别分析各自的噪声模型。最后指明了该领域的进一步研究工作方向。

In optical wireless communication system,photoelectric conversion is realized by photodetector at the receiver,and the noise in the detector will directly affect the photoelectric conversion efficiency.Based on the background of optical wireless communication,according to the generation mechanism of photodetector noise,this paper describes the shot noise,multiple generation compound noise,1/f noise and thermal noise of the detector respectively,and gives the corresponding mathematical models.The noise models of avalanche photodetector,original negative signature detector,photomultiplier tube,four quadrant detector,quantum dot infrared detector and balance detector are analyzed respectively.Finally,the direction of further research in this field is pointed out.