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Signal correlation methods for photodetector noise characterization

机译:用于光电探测器噪声表征的信号相关方法

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摘要

Noise parameters of a photodetector have a significant role in many science and life activities, e.g. gas spectroscopy, optical communication, objects detection and recognition, construction of laser rangefinders. However, applied noise measurement methods are not so efficient to study new generation of infrared radiation detectors. The paper presents performance comparison of two correlation methods of photodetector signal to determine its noise. These methods apply the signal correlation of a time series with itself (autocorrelation method - ACM) and the similarity between two time series (cross-correlation method with two-channel signal readout - CCM). Both methods were analyzed using a designed simulator (MATLAB/Simulink). It makes it possible to design a special system consisted of electronic block of a two-channel signal readout and signal processing unit. The verification of this setup performances for noise measurement was performed using some low-noise resistors with well-defined resistances. Finally, the setup was also used to measure noise spectral density of MCT detector.
机译:光电探测器的噪声参数在许多科学和生活活动中都起着重要作用,例如气相色谱,光学通信,物体检测和识别,激光测距仪的构造。但是,应用噪声测量方法对研究新一代红外辐射探测器的效率不高。本文介绍了两种确定光检测器信号相关性方法的性能比较。这些方法应用了时间序列与其自身的信号相关性(自相关方法-ACM)和两个时间序列之间的相似性(具有两通道信号读出的互相关方法-CCM)。使用设计的模拟器(MATLAB / Simulink)分析了这两种方法。这使得设计一个特殊的系统成为可能,该系统由两通道信号读出的电子模块和信号处理单元组成。使用一些具有明确电阻的低噪声电阻器来验证此设置性能以进行噪声测量。最后,该设置还用于测量MCT检测器的噪声频谱密度。

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