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2 June 2014 Bend-insensitive fiber based vibration sensor
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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915775 (2014)
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain
We report two novel fiber-optic vibration sensors based on standard telecom bend-insensitive fiber (BIF). A tapered BIF forming a fiber Mach-Zehnder interferometer could measure continuous and damped vibration from 1 Hz up to 500 kHz. An enclosed microcantilever is fabricated inside the BIF by chemical etching and fusion spliced with a readout singlemode fiber that exhibits a frequency range from 5 Hz to 10 kHz with high signal-to-noise ratio (SNR) up to 68 dB. The unique double cladding structure of the BIF ensures both sensors with advantages of compactness, high resistance to the external disturbance and stronger mechanical strength.
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Yanping Xu, Ping Lu, Farhana Baset, Vedula Ravi Bhardwaj, and Xiaoyi Bao "Bend-insensitive fiber based vibration sensor", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915775 (2 June 2014);

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