Intensity-modulated strain sensor based on fiber Mach-Zehnder interferometer employing core-offset

Jiangtao Zhou; Changrui Liao; Yiping Wang; Kaiming Yang; Xiaoyong Zhong; Zhengyong Li; Yingjie Liu; Guangjun Wang

doi:10.1117/12.2034250

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15 October 2013 Intensity-modulated strain sensor based on fiber Mach-Zehnder interferometer employing core-offset

Jiangtao Zhou; Changrui Liao; Yiping Wang; Kaiming Yang; Xiaoyong Zhong; Zhengyong Li; Yingjie Liu; Guangjun Wang

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Proceedings Volume 8924, Fourth Asia Pacific Optical Sensors Conference; 89240X (2013) https://doi.org/10.1117/12.2034250
Event: Asia Pacific Optical Sensors Conference 2013, 2013, Wuhan, China

Abstract

A novel intensity-modulated strain sensor based on a fiber in-line Mach-Zehnder interferometer is proposed and demonstrated, which is constructed by splicing a thin core fiber between two single mode fibers with a core offset. Such an interferometer exhibits a large fringe visibility of more than 15 dB. When used in axial strain sensing from 0 to 400 με, the interferometer operates at intensity mode of detection with a high sensitivity of -0.023 dB/μεwithout the cross sensitivity between temperature and strain. Its ease of fabrication, high strain sensitivity and intensity mode of detection makes it a low-cost alternative to existing sensing applications.

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Jiangtao Zhou, Changrui Liao, Yiping Wang, Kaiming Yang, Xiaoyong Zhong, Zhengyong Li, Yingjie Liu, and Guangjun Wang "Intensity-modulated strain sensor based on fiber Mach-Zehnder interferometer employing core-offset", Proc. SPIE 8924, Fourth Asia Pacific Optical Sensors Conference, 89240X (15 October 2013); https://doi.org/10.1117/12.2034250

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