10 April 2018 Fabry–Perot cavity cascaded sagnac loops for temperature and strain measurements
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Abstract
The fabrication process and temperature and strain characterizations of an all-fiber sensor are presented. The sensing structure based on a Fabry–Perot cavity (FPC) and sagnac loops was proposed and experimentally demonstrated for measurements of temperature and strain. The FPC consists of a micropiece of chemical etched multimode fiber end face, welded with another single mode fiber. Then, the sagnac loops composed of polarization maintaining fiber was connected to the FPC. The sensor was fabricated and tested for temperature and strain. Experimental results show that sensitivity of temperature and strain is 0.71  ±  0.03  nm  /    °  C and 1.30  ±  0.01  pm  /  μϵ, respectively; the linearity are 0.9970 and 0.9996, respectively.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Chunmei Shangguan, Wen Zhang, Wei Hei, Fei Luo, Lianqing Zhu, "Fabry–Perot cavity cascaded sagnac loops for temperature and strain measurements," Optical Engineering 57(4), 047103 (10 April 2018). https://doi.org/10.1117/1.OE.57.4.047103 Submission: Received 18 October 2017; Accepted 21 February 2018
Submission: Received 18 October 2017; Accepted 21 February 2018
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