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

Xinying Han; Hongqiao Wen; Sheng Liu; Yuchuan Xiong; Zhihui Luo

doi:10.1117/1.OE.56.5.056104

10 May 2017 Dual-fiber-Bragg gratings accelerometer for the detection of geosound caused by debris flow

Xinying Han, Hongqiao Wen, Sheng Liu, Yuchuan Xiong, Zhihui Luo

Author Affiliations +

Optical Engineering, Vol. 56, Issue 5, 056104 (May 2017). https://doi.org/10.1117/1.OE.56.5.056104

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.

Citation Download 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," Optical Engineering 56(5), 056104 (10 May 2017). https://doi.org/10.1117/1.OE.56.5.056104

Received: 7 February 2017; Accepted: 18 April 2017; Published: 10 May 2017

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