Dual-parameter amplification sensing of temperature and strain by using parallel dual Fabry–Perot interferometer

Yundong Zhang; Kaiyue Qi; Jianfeng Sun; Ying Guo; Yongfeng Wu

doi:10.1117/12.2617256

2 March 2022 Dual-parameter amplification sensing of temperature and strain by using parallel dual Fabry–Perot interferometer

Yundong Zhang, Kaiyue Qi, Jianfeng Sun, Ying Guo, Yongfeng Wu

Author Affiliations +

Proceedings Volume 12016, Optical and Quantum Sensing and Precision Metrology II; 120160W (2022) https://doi.org/10.1117/12.2617256
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

In this paper, we proposed and demonstrated a parallel optical fiber Fabry–Perot interferometer (FPI) for temperature and strain sensor based on an optimized 3×2 steps fabrication process, aiming to improve the quality of the sensitivity by use of the Vernier effect. The sensor consists of two FPIs with different propagation mediums in parallel connection, which is formed by pairs of built-in plate reflectors, another is fabricated by splicing a three-hole fiber (THF) supported by a suspension core, the higher thermal-optical coefficient can improve the temperature sensitivity. In temperature and strain sensing, two different combinations of FPIS are used as sensing units and matching reference units respectively. The amplification is matched to the wavelength range of the light source by accurately controlling the cavity length between the two FPIs. The temperature and strain sensitivities achieved in the experiment are 182.15 pm/°C and 201.47 pm/µε, respectively. The separate settings of temperature and strain sensing amplification increase the flexibility applications of dual-parameter amplification sensors.

Conference Presentation

Citation Download Citation

Yundong Zhang, Kaiyue Qi, Jianfeng Sun, Ying Guo, and Yongfeng Wu "Dual-parameter amplification sensing of temperature and strain by using parallel dual Fabry–Perot interferometer", Proc. SPIE 12016, Optical and Quantum Sensing and Precision Metrology II, 120160W (2 March 2022); https://doi.org/10.1117/12.2617256

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