Paper
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.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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KEYWORDS
Interferometers

Sensors

Sensing systems

Phase shift keying

Demodulation

Mirrors

Phase interferometry

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