Signal correlation methods for photodetector noise characterization

M. Chojnowska; K. Achtenberg; J. Mikołajczyk

doi:10.1117/12.2324878

14 August 2018 Signal correlation methods for photodetector noise characterization

M. Chojnowska, K. Achtenberg, J. Mikołajczyk

Proceedings Volume 10830, 13th Conference on Integrated Optics: Sensors, Sensing Structures, and Methods; 1083003 (2018) https://doi.org/10.1117/12.2324878
Event: Thirteenth Integrated Optics: Sensors, Sensing Structures and Methods Conference, 2018, Szcyrk, Poland

Abstract

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 twochannel 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.

Citation Download Citation

M. Chojnowska, K. Achtenberg, and J. Mikołajczyk "Signal correlation methods for photodetector noise characterization", Proc. SPIE 10830, 13th Conference on Integrated Optics: Sensors, Sensing Structures, and Methods, 1083003 (14 August 2018); https://doi.org/10.1117/12.2324878

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