Microwave photonic interrogation of a real-time gas vacuum sensor

Baoliang Liao; Guangying Wang; Tiansheng Huang; Li-Peng Sun; Yuan Cao; Xudong Wang; Xinhuan Feng; Bai-Ou Guan; Jianping Yao

doi:10.1117/12.2617732

15 February 2022 Microwave photonic interrogation of a real-time gas vacuum sensor

Baoliang Liao, Guangying Wang, Tiansheng Huang, Li-Peng Sun, Yuan Cao, Xudong Wang, Xinhuan Feng, Bai-Ou Guan, Jianping Yao

Author Affiliations +

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 1216668 (2022) https://doi.org/10.1117/12.2617732
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

A real-time gas vacuum sensor interrogated based on a microwave photonic method at high speed and high resolution is proposed and demonstrated. The sensor is a microfiber Mach-Zehnder interferometer (mMZI) with its wavelength sensitive to the gas concentration. Instead of detecting the wavelength shift of the mMZI spectrum in the optical domain, we convert the mMZI spectrum to the time domain by spectral shaping and wavelength-to-time (SS-WTT) mapping and apply a digital signal processor (DSP) to realize the cross-correlation to estimate the wavelength shift of the mMZI. The sensitivity and resolution of the proposed gas vacuum sensor are -0.586 ps/ppm and 34.13 ppm with a concentration range from 0 to 1.4×10⁴ ppm, respectively.

Citation Download Citation

Baoliang Liao, Guangying Wang, Tiansheng Huang, Li-Peng Sun, Yuan Cao, Xudong Wang, Xinhuan Feng, Bai-Ou Guan, and Jianping Yao "Microwave photonic interrogation of a real-time gas vacuum sensor", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 1216668 (15 February 2022); https://doi.org/10.1117/12.2617732

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