Optical-frequency-comb stabilised lasers for interrogation of fibre-resonator strain sensors

Gianluca Gagliardi; Mario Salza; Pietro Ferraro; Paolo De Natale

doi:10.1117/12.835199

5 October 2009 Optical-frequency-comb stabilised lasers for interrogation of fibre-resonator strain sensors

Gianluca Gagliardi, Mario Salza, Pietro Ferraro, Paolo De Natale

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75033N (2009) https://doi.org/10.1117/12.835199
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

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.

Citation Download Citation

Gianluca Gagliardi, Mario Salza, Pietro Ferraro, and Paolo De Natale "Optical-frequency-comb stabilised lasers for interrogation of fibre-resonator strain sensors", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75033N (5 October 2009); https://doi.org/10.1117/12.835199

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