Optical-frequency-comb stabilised lasers for interrogation of fibre-resonator strain sensors
Authors: Gagliardi G., Salza M., Ferraro P., De Natale P.
Autors Affiliation: CNR, Istituto Nazionale di Ottica Applicata (INOA), Compl. A. Olivetti, via Campi Flegrei 34, 80078 Pozzuoli (Naples), Italy
Abstract: Quasi-static and dynamic strain sensing is performed by means of a fibre Bragg-grating resonator based on an optical-frequency-comb stabilised laser. The comb synthesizer, centred around 1560 nm, is a fs-pulsed fibre laser, which is phase-locked to an ultra-stable quartz oscillator, serving as an optical reference to minimise laser-frequency and phase noise both in the long and short-term operation. Detection limits in the order of a few pεRMS/√Hz, in the Hz and sub-Hz range, are demonstrated, while a sub- pε sensitivity is expected at higher frequencies in the acoustic range. © 2009 SPIE.
Journal/Review: PROCEEDINGS OF SPIE
Volume: 7503 Pages from: 75033N to: 75033N
More Information: ISSN: 0277786X
DOI: 10.1117/12.835199 KeyWords: Bragg gratings; Fiber Bragg gratings; static strain