Optical-frequency-comb based interrogation of fiber resonators

Year: 2011

Authors: Gagliardi G., Avino S., Fabian M., Salza M., Ferraro P., De Natale P.

Autors Affiliation: CNR-Istituto Nazionale di Ottica (INO), via Campi Flegrei 34, Compl. A. Olivetti
80078 Pozzuoli (Naples), Italy;
Optical Fibre Sensors Research Centre, Department of Electronic and Computer Engineering, University of Limerick, Limerick, Ireland

Abstract: Strain sensing at the 10-13 level, from the mHz to the kHz frequency range, is performed using a fiber Bragggrating resonator interrogated by an optical-frequency-comb stabilized laser. The optical-comb synthesizer is a fs-pulsed fiber laser phase-locked to a quartz oscillator, which provides for a very high laser-frequency stability. The comb teeth span over the 1510-1580 nm spectral interval. Therefore, the OFS is also used as a coherent radiation source for fiber-loop cavity ring-down evanescent-wave spectroscopy of analytes diluted in liquid samples.

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KeyWords: Cavity ring-down; Evanescent wave spectroscopy; Fiber Bragg; Laser frequency locking; Optical fiber resonator; Optical frequency combs; Strain sensors; Fiber Bragg gratings; Fiber lasers; Fiber optic sensors; Mode-locked fiber lasers; Pulsed lasers; Quantum optics; Quartz; Resonators; Sensors; Fibers
DOI: 10.1117/12.885911

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