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Proceedings Paper

Tunable optical source for the interrogation of Bragg gratings via spectral scanning
Author(s): Aleksander S. Paterno; Jose Luis Fabris; Hypolito Jose Kalinowski
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Paper Abstract

This paper describes the implementation of an interrogation system with a tunable Erbium doped fiber ring-laser (EDFL). The EDFL is used to illuminate optical devices like Bragg gratings, so that it can also be used as an interrogation system to determine the spectral characteristics of the devices. An intra-cavity Fabry-Perot filter, driven by a dedicated voltage ramp generator, tunes the EDF laser. The resulting optical signal is captured by a photodetector and analyzed in a personal computer. The apparatus can be used as an optical spectrum analyzer for passive components and as an interrogation system for multiplexed fiber Bragg grating based sensors. As an application example, the temperature inside a concrete beam submitted to systematic heating and vibrations has been remotely measured with the system.

Paper Details

Date Published: 21 October 2004
PDF: 6 pages
Proc. SPIE 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, (21 October 2004); doi: 10.1117/12.590764
Show Author Affiliations
Aleksander S. Paterno, Ctr. Federal de Educacao Tecnologica do Parana (Brazil)
Jose Luis Fabris, Ctr. Federal de Educacao Tecnologica do Parana (Brazil)
Hypolito Jose Kalinowski, Ctr. Federal de Educacao Tecnologica do Parana (Brazil)


Published in SPIE Proceedings Vol. 5622:
5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications
Aristides Marcano O.; Jose Luis Paz, Editor(s)

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