A Sagnac loop sensor for simultaneous strain and temperature measurement

Juan Kang; Xinyong Dong; Chunliu Zhao; Youwei Zhao; Mengchao Li

doi:10.1117/12.885572

17 May 2011 A Sagnac loop sensor for simultaneous strain and temperature measurement

Juan Kang, Xinyong Dong, Chunliu Zhao, Youwei Zhao, Mengchao Li

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77531E (2011) https://doi.org/10.1117/12.885572
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

A Sagnac loop sensor with a long-period grating (LPG) inscribed in polarization maintains fiber (PMF) for simultaneous strain and temperature measurement is proposed. Taking using of the different responses of the LPG and the Sagnac loop to strain and temperature, simultaneous measurement can be achieved by monitoring the wavelength shifts and the intensity changes of resonance peaks. The experiments show that sensitivity of strain and temperature are 6.4×10^-3 dB/με and 0.65 nm/°C, respectively.

Citation Download Citation

Juan Kang, Xinyong Dong, Chunliu Zhao, Youwei Zhao, and Mengchao Li "A Sagnac loop sensor for simultaneous strain and temperature measurement", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77531E (17 May 2011); https://doi.org/10.1117/12.885572

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