Research on the novel concentration sensor based on multi-longitudinal mode laser interference

Chenchen Wang; Yao Xu; Hongyu Zu; Kang Gu; Qiheng Huang; Qinchao Huang; Yong Wang

doi:10.1117/12.2666295

4 April 2023 Research on the novel concentration sensor based on multi-longitudinal mode laser interference

Chenchen Wang, Yao Xu, Hongyu Zu, Kang Gu, Qiheng Huang, Qinchao Huang, Yong Wang

Proceedings Volume 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications; 1261747 (2023) https://doi.org/10.1117/12.2666295
Event: 9th Symposium on Novel Photoelectronic Detection Technology and Applications (NDTA 2022), 2022, Hefei, China

Abstract

In this paper, a novel non-contact optical measurement method based on the principle of laser self mixing interference for measuring liquid concentration is proposed. The optical path difference caused by changing the concentration of the solution, we found the phenomenon of waveform separation in the laser self-mixing vibration signal. In this system, simulation results of different solution concentrations are obtained based on the feature that each longitudinal mode is independent and do not interfere with each other in the multi-longitudinal mode laser, which successfully verified the corresponding relationship between the degree of waveform separation and the concentration of the solution.

Citation Download Citation

Chenchen Wang, Yao Xu, Hongyu Zu, Kang Gu, Qiheng Huang, Qinchao Huang, and Yong Wang "Research on the novel concentration sensor based on multi-longitudinal mode laser interference", Proc. SPIE 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications, 1261747 (4 April 2023); https://doi.org/10.1117/12.2666295

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