Intensity-modulated optical fiber sensor for static strain and vibration monitoring

Na Li; Jingke Li; Chuanyi Tao; Junhua Cheng; Xuhai Jiang; Jing Zhang; Liming Mao; Jianjun Xiao; Yan Zhao

doi:10.1117/12.2536427

20 November 2019 Intensity-modulated optical fiber sensor for static strain and vibration monitoring

Na Li, Jingke Li, Chuanyi Tao, Junhua Cheng, Xuhai Jiang, Jing Zhang, Liming Mao, Jianjun Xiao, Yan Zhao

Proceedings Volume 11191, Advanced Sensor Systems and Applications IX; 111910T (2019) https://doi.org/10.1117/12.2536427
Event: SPIE/COS Photonics Asia, 2019, Hangzhou, China

Abstract

An intensity-modulated optical fiber sensor is presented for static strain and vibration monitoring, which is fabricated by splicing a small section thin-core fiber between two standard single-mode fibers. Static strain measurement is performed using a simple cantilever system and a referenced fiber Bragg grating for sensing strain. The results show that optical loss increases with the rising strain for TCF sensor and the maximum optical loss is 0.133 dB. The dynamic response measurement of the cantilever vibration is demonstrated. The experimentally measured vibration frequency range is from 1 Hz to 200 Hz. The developed thin-core fiber sensor has the advantage of no complex demodulation, cost efficient and simple in structure, which is a potential monitoring method for large-scale construction, mechanical equipment, aerospace, and even earth activities.

Citation Download Citation

Na Li, Jingke Li, Chuanyi Tao, Junhua Cheng, Xuhai Jiang, Jing Zhang, Liming Mao, Jianjun Xiao, and Yan Zhao "Intensity-modulated optical fiber sensor for static strain and vibration monitoring", Proc. SPIE 11191, Advanced Sensor Systems and Applications IX, 111910T (20 November 2019); https://doi.org/10.1117/12.2536427

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