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Proceedings Paper

Wavelength tunable fiber ring laser for high-speed interrogation of fiber Bragg grating sensors
Author(s): Guillaume Laffont; N. Roussel; L. Maurin; J. Boussoir; B. Clogenson; L. Auger; Sylvain Magne; Pierre Ferdinand
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Paper 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.

Paper Details

Date Published: 23 May 2005
PDF: 5 pages
Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.623442
Show Author Affiliations
Guillaume Laffont, CEA LIST (France)
N. Roussel, CEA LIST (France)
L. Maurin, CEA LIST (France)
J. Boussoir, CEA LIST (France)
B. Clogenson, CEA LIST (France)
L. Auger, CEA LIST (France)
Sylvain Magne, CEA LIST (France)
Pierre Ferdinand, CEA LIST (France)

Published in SPIE Proceedings Vol. 5855:
17th International Conference on Optical Fibre Sensors
Marc Voet; Reinhardt Willsch; Wolfgang Ecke; Julian Jones; Brian Culshaw, Editor(s)

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