Title :
Ultra-sensitive dynamic strain detection by phase-sensitive laser frequency locking to a passive Bragg grating resonator
Author :
Chow, Jong H. ; Littler, Ian C M ; McClelland, David E. ; Gray, Malcolm B.
Author_Institution :
Fac. of Sci., Australian Nat. Univ., Canberra, ACT, Australia
Abstract :
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.
Keywords :
Bragg gratings; Fabry-Perot resonators; fibre optic sensors; laser mode locking; optical modulation; optical signal detection; phase modulation; strain sensors; Fabry-Perot resonator; Pound-Drever-Hall technique; passive Bragg grating resonator; phase-sensitive laser frequency locking; picostrain sensing technique; radio-frequency phase modulation; signal extraction; ultrasensitive dynamic strain detection; Australia; Bragg gratings; Capacitive sensors; Laser noise; Laser theory; Laser tuning; Optical resonators; Phase detection; Phase frequency detector; Resonance;
Conference_Titel :
Optical Fiber Communication Conference, 2005. Technical Digest. OFC/NFOEC
Print_ISBN :
1-55752-783-0
DOI :
10.1109/OFC.2005.192595
