Lasers, Fiber Optics, and Communications

Dual-fiber-Bragg gratings accelerometer for the detection of geosound caused by debris flow

[+] Author Affiliations
Xinying Han, Hongqiao Wen, Sheng Liu, Yuchuan Xiong, Zhihui Luo

Wuhan University of Technology, National Engineering Laboratory of Optic Fiber Sensing Technology, Wuhan, China

Opt. Eng. 56(5), 056104 (May 10, 2017). doi:10.1117/1.OE.56.5.056104
History: Received February 7, 2017; Accepted April 18, 2017
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Abstract.  The cantilever-beam accelerometer based on dual-fiber-Bragg gratings (FBGs) is proposed to detect the geosound caused by debris flow. The structure and working principle of the accelerometer are demonstrated. Dual FBGs are introduced to improve the sensitivity and frequency response of the accelerometer. By using a bend insensitive optical fiber and ultrathin coating, the sensitivity and serial multiplexing performance of the sensor are improved remarkably. Experimental results show that the accelerometer, with a sensitivity of 900  pm/g and the natural frequency of 280 Hz, can effectively detect the geosound caused by debris flow.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Xinying Han ; Hongqiao Wen ; Sheng Liu ; Yuchuan Xiong and Zhihui Luo
"Dual-fiber-Bragg gratings accelerometer for the detection of geosound caused by debris flow", Opt. Eng. 56(5), 056104 (May 10, 2017). ; http://dx.doi.org/10.1117/1.OE.56.5.056104


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