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High-Sensitivity Distributed Bragg Reflector Fiber Laser Displacement Sensor

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2 Author(s)
Yang Zhang ; PolyU-DUT Joint Res. Center for Photonics & Sch. of Phys. & Optoelectron. Eng., Dalian Univ. of Technol., Dalian ; Bai-ou Guan

A high-sensitivity displacement sensor based on the integration of a dual polarization distributed Bragg reflector fiber laser with cantilever beam is demonstrated. The cantilever beam converts the displacement into a transverse force onto the fiber laser which results in a modulation in the fiber birefringence and hence the beat frequency of the laser. A sensitivity of 0.402 GHz/mm is implemented. The sensitivity dependence on the parameters of the transducer is investigated.

Published in:

Photonics Technology Letters, IEEE  (Volume:21 ,  Issue: 5 )