Ultra-sensitive dynamic strain detection by phase-sensitive laser frequency locking to a passive Bragg grating resonator
We demonstrate a pico-strain sensing technique by remote interrogation of passive Bragg grating Fabry-Perot resonators, based on the Pound-Drever-Hall technique, used for laser frequency locking and signal extraction. It employs radio-frequency phase modulation to derive error signals.
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|Source:||OFC Technical Digest|