23 April 2017 A new fiber optic accelerometer with push-pull structure using 3×3 coupler
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Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 1032394 (2017) https://doi.org/10.1117/12.2267495
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of
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.
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Xiaokang Qiu, Xiaokang Qiu, Fei Liu, Fei Liu, Bin Xie, Bin Xie, Hongpu Zhou, Hongpu Zhou, Duo Yi, Duo Yi, Xiangge He, Xiangge He, Xiaoping Zheng, Xiaoping Zheng, Min Zhang, Min Zhang, } "A new fiber optic accelerometer with push-pull structure using 3×3 coupler", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032394 (23 April 2017); doi: 10.1117/12.2267495; https://doi.org/10.1117/12.2267495
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