Study on factors influencing signal-to-noise ratio of the incoherent laser monitoring system

Yahang Li; Chuntian Chen; Haitao Lin

doi:10.1117/12.2666361

4 April 2023 Study on factors influencing signal-to-noise ratio of the incoherent laser monitoring system

Yahang Li, Chuntian Chen, Haitao Lin

Proceedings Volume 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications; 126174L (2023) https://doi.org/10.1117/12.2666361
Event: 9th Symposium on Novel Photoelectronic Detection Technology and Applications (NDTA 2022), 2022, Hefei, China

Abstract

The laser monitoring system based on incoherent detection can monitor the voice information of the target and has very important applications in many fields. However, due to the influence of multiple coupling factors, how to implement the high signal-to-noise ratio of this monitoring system is still a research hotspot. In this study, an acoustic field vibration model is established. Based on Lambert's scattering law and the finite element analysis method, the sound field of incoherent detection is simulated. Combined with the experimental results, three key factors such as the material of the vibration target material, the laser emitter angle and the angle of the receiver end of the photoelectric detector are studied. Measure the influence of the Signal-to-Noise Ratio (SNR) of the system. At present, the research results show that the amplitude of the vibration target of different materials is larger, the signal-to-noise ratio of the system is better; the signal-to-noise ratio is the best when the vibration object and the laser source and photodetector are at an angle of 45°.

Citation Download Citation

Yahang Li, Chuntian Chen, and Haitao Lin "Study on factors influencing signal-to-noise ratio of the incoherent laser monitoring system", Proc. SPIE 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications, 126174L (4 April 2023); https://doi.org/10.1117/12.2666361

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