2 June 2014 Interrogation of miniature extrinsic Fabry-Pérot sensor using path matched differential interferometer and phase generated carrier scheme
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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.
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Fuyin Wang, Fuyin Wang, Jiehui Xie, Jiehui Xie, Zhengliang Hu, Zhengliang Hu, Shuidong Xiong, Shuidong Xiong, Hong Luo, Hong Luo, Yongming Hu, 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); doi: 10.1117/12.2059310; https://doi.org/10.1117/12.2059310
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