10 May 2017 Dual-fiber-Bragg gratings accelerometer for the detection of geosound caused by debris flow
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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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Xinying Han, Hongqiao Wen, Sheng Liu, Yuchuan Xiong, Zhihui Luo, "Dual-fiber-Bragg gratings accelerometer for the detection of geosound caused by debris flow," Optical Engineering 56(5), 056104 (10 May 2017). https://doi.org/10.1117/1.OE.56.5.056104 . Submission: Received: 7 February 2017; Accepted: 18 April 2017
Received: 7 February 2017; Accepted: 18 April 2017; Published: 10 May 2017
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