Interrogation of miniature extrinsic Fabry-Perot sensor using path matched differential interferometer and phase generated carrier scheme

Fuyin Wang; Jiehui Xie; Zhengliang Hu; Shuidong Xiong; Hong Luo; Yongming Hu

doi:10.1117/12.2059310

2 June 2014 Interrogation of miniature extrinsic Fabry-Pérot sensor using path matched differential interferometer and phase generated carrier scheme

Fuyin Wang, Jiehui Xie, Zhengliang Hu, Shuidong Xiong, Hong Luo, Yongming Hu

Author Affiliations +

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915718 (2014) https://doi.org/10.1117/12.2059310
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

Study of fiber optic extrinsic Fabry-Pérot sensors utilizing state-of-the-art MEMS technology mostly focus on sensor fabrication for various applications, while the signal interrogation is still insatiable to current application. In this paper, we propose a white light path matched differential interferometer dynamic sensing system utilizing phase generated carrier demodulation scheme. A step motor with a movable mirror and a fiber-wound piezoelectric transducer string are used to act path matching and phase modulation respectively. Experimental results show that the sensing signal could be correctly recovered with low distortion and the phase noise spectrum level is less than -100 dB re. rad/√Hz above 2.5 kHz.

Citation Download Citation

Fuyin Wang, Jiehui Xie, Zhengliang Hu, Shuidong Xiong, Hong Luo, and Yongming Hu "Interrogation of miniature extrinsic Fabry-Pérot sensor using path matched differential interferometer and phase generated carrier scheme", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915718 (2 June 2014); https://doi.org/10.1117/12.2059310

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