Tunable optical source for the interrogation of Bragg gratings via spectral scanning

Aleksander S. Paterno; Jose Luis Fabris; Hypolito Jose Kalinowski

doi:10.1117/12.590764

21 October 2004 Tunable optical source for the interrogation of Bragg gratings via spectral scanning

Aleksander S. Paterno, Jose Luis Fabris, Hypolito Jose Kalinowski

Proceedings Volume 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications; (2004) https://doi.org/10.1117/12.590764
Event: 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, 2004, Porlamar, Venezuela

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.

Citation Download Citation

Aleksander S. Paterno, Jose Luis Fabris, and Hypolito Jose Kalinowski "Tunable optical source for the interrogation of Bragg gratings via spectral scanning", Proc. SPIE 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, (21 October 2004); https://doi.org/10.1117/12.590764

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