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A new fiber optic accelerometer with push-pull structure using 3×3 coupler
Author(s): Xiaokang Qiu; Fei Liu; Bin Xie; Hongpu Zhou; Duo Yi; Xiangge He; Xiaoping Zheng; Min Zhang
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Paper Abstract

In this paper, we propose a new type of push-pull structure fiber optic accelerometer based on 3×3 coupler for the first time and carried out measurements of its responsivity and cross-axis sensitivity. With specific algorithm, the phase signal of the sensor can be extracted without complicated modulation and demodulation. Experiments show that the responsivity of the accelerometer is larger than 40dB (0dB ref 1rad/g) within the frequency band from 10Hz to 800Hz, which agrees well with the theoretical analysis. In addition, the cross-axis sensitivity can be optimized as low as about -30dB due to the push-pull structure. The results reported here indicate that this type of fiber optic accelerometer can be applied in vibration sensing such as micro seismic monitoring.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032394 (23 April 2017); doi: 10.1117/12.2267495
Show Author Affiliations
Xiaokang Qiu, Tsinghua Univ. (China)
Fei Liu, Tsinghua Univ. (China)
Bin Xie, Petro China Xinjiang Oilfield Co. (China)
Hongpu Zhou, Tsinghua Univ. (China)
Duo Yi, Peking Univ. (China)
Xiangge He, Tsinghua Univ. (China)
Xiaoping Zheng, Tsinghua Univ. (China)
Min Zhang, Tsinghua Univ. (China)
Peking Univ. (China)


Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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