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Conference Papers Year : 2005

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

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Abstract

A wavelength tunable erbium-doped fiber ring laser dedicated to high-speed interrogation of Fiber Bragg Grating (FBG) sensors has been realised and characterised. 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
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Dates and versions

cea-03907585 , version 1 (20-12-2022)

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Guillaume Laffont, Nicolas Roussel, Laurent Maurin, Jonathan Boussoir, B. Clogenson, et al.. Wavelength tunable fiber ring laser for high-speed interrogation of fiber Bragg grating sensors. OFS17 - 17th International Conference on Optical Fiber Sensors, May 2005, Bruges, Belgium. pp.342, ⟨10.1117/12.623442⟩. ⟨cea-03907585⟩

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