Wavelength tunable fiber ring laser for high-speed interrogation of fiber Bragg grating sensors

Guillaume Laffont; N. Roussel; L. Maurin; J. Boussoir; B. Clogenson; L. Auger; Sylvain Magne; Pierre Ferdinand

doi:10.1117/12.623442

23 May 2005 Wavelength tunable fiber ring laser for high-speed interrogation of fiber Bragg grating sensors

Guillaume Laffont, N. Roussel, L. Maurin, J. Boussoir, B. Clogenson, L. Auger, Sylvain Magne, Pierre Ferdinand

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623442
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

A wavelength tunable erbium-doped fiber ring laser dedicated to high-speed interrogation of Fiber Bragg Grating (FBG) sensors has been realised and characterized. A standard FBG is used as the output mirror whereas an intra cavity spectral filter formed by a π-phase-shifted FBG is implemented to narrow the output laser spectrum down to 0.5 pm. The emitting wavelength is tuned at 500 Hz over 3.6 nm by simultaneously straining both the standard and π-phase-shifted FBG with a piezoelectric actuator. An all-fiber Michelson interferometer is used to accurately determine the spectral scanning range. Bragg wavelength increments equal to 1.3 pm are resolved combining both wavelength referencing with an absorption gas cell and amplitude normalisation versus the laser output power. This instrumentation is designed to be embedded in a train cabin for making on-board strain and temperature measurements on pantographs with FBG sensors.

Citation Download Citation

Guillaume Laffont, N. Roussel, L. Maurin, J. Boussoir, B. Clogenson, L. Auger, Sylvain Magne, and Pierre Ferdinand "Wavelength tunable fiber ring laser for high-speed interrogation of fiber Bragg grating sensors", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623442

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