Gas pressure measurement using spatial heterodyne spectroscopy

Yafei Zhang; Meng Dong; Wenjie Jia; Yongjun Cheng

doi:10.1117/12.3048750

5 December 2024 Gas pressure measurement using spatial heterodyne spectroscopy

Yafei Zhang, Meng Dong, Wenjie Jia, Yongjun Cheng

Proceedings Volume 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024); 134183N (2024) https://doi.org/10.1117/12.3048750
Event: 15th International Conference on Information Optics and Photonics (CIOP2024), 2024, Xi’an, China

Abstract

With the quantization of traditional metrology standards, quantum vacuum metrology based on optical methods has been developed. In this paper, a new method of measuring gas pressure is proposed by combining quantum vacuum metrology technology based on optical interferometry and spatial heterodyne spectroscopy. The two arms of the SHS are closed as a gas chamber. In the chamber, refractivity change caused by gas pressure will change the OPD distribution on image plane. Through OPD analysis, the theoretical expression of interference fringes including the effect of refractive index was obtained. And then numerical simulations were performed, in which the changes of Littrow wavelength, fringe period and phase when the air pressure changed from 0 to 1 ATM were 0.17 nm, 6.21 periods and 19.50 rad. Subsequent ray tracing simulations further validated the measurement theory of this paper.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yafei Zhang, Meng Dong, Wenjie Jia, and Yongjun Cheng "Gas pressure measurement using spatial heterodyne spectroscopy", Proc. SPIE 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024), 134183N (5 December 2024); https://doi.org/10.1117/12.3048750

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