Phase-sensitive interrogation of fiber Bragg grating resonators for sensing applications

Details Phase-sensitive interrogation of fiber Bragg grating resonators for sensing applications Phase-sensitive interrogation of fiber Bragg grating resonators for sensing applications

2004-11-09

arxiv.org/abs/physics/0411101v1

Physics

Optics

Submitted to Journal of Lightwave Technology

Scientific paper

10.1109/JLT.2005.846895

We discuss a phase-sensitive technique for remote interrogation of passive Bragg grating Fabry-Perot resonators. It is based on Pound-Drever-Hall laser frequency locking, using radio-frequency phase modulation sidebands to derive an error signal from the complex optical response, near resonance, of a Fabry-Perot interferometer. We examine how modulation frequency and resonance bandwidth affect this error signal. Experimental results are presented that demonstrate when the laser is locked, this method detects differential phase shifts in the optical carrier relative to its sidebands, due to minute fiber optical path displacements.

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