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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Bibliographic Details
Main Authors: Chow, J.H., Littler, I.C.M., McClelland, D.E., Gray, M.B.
Format: Conference Proceeding
Language:English
Subjects:
Australia
Bragg gratings
Capacitive sensors
Laser noise
Laser theory
Laser tuning
Optical resonators
Phase detection
Phase frequency detector
Resonance
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Description
Summary: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.
DOI:10.1109/OFC.2005.192595