Fiber-Optic Accelerometer Using Tilted Grating Inscribed in Depressed Cladding Fibers

We propose and experimentally demonstrate a compact fiber-optic vibration sensor in which a tilted Bragg grating is inscribed in the core of a depressed cladding fiber. The sensor provides resolution up to 2×10 -2 m/s 2 and a linear acceleration response between 0.2 and 6.0 m/s 2 , together with a f...

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Veröffentlicht in:IEEE photonics technology letters 2017-12, Vol.29 (24), p.2171-2174
Hauptverfasser: Cai, Shunshuo, Nan, Yinggang, Xie, Wenping, Yi, Jun, Chen, Xiaoyong, Rong, Qiangzhou, Liang, Hao, Nie, Ming, Peng, Gang-Ding, Guo, Tuan
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Sprache:eng
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Zusammenfassung:We propose and experimentally demonstrate a compact fiber-optic vibration sensor in which a tilted Bragg grating is inscribed in the core of a depressed cladding fiber. The sensor provides resolution up to 2×10 -2 m/s 2 and a linear acceleration response between 0.2 and 6.0 m/s 2 , together with a flat frequency response between 1 and 120 Hz. The sensor takes advantage of a cost-effective interrogation scheme by monitoring the total reflection power of the fiber sensor. We use the calibrated output to eliminate the potential light source and fiber loss-induced power fluctuations. The proposed sensing system has been used to measure the vibration of a mechanical damper in electrical transmission lines and the results agree well with those from a commercial sensor.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2017.2767820