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Proceedings Paper

Processing of signals from fiber Bragg gratings using unbalanced interferometers
Author(s): Grigory Adamovsky; Jeff Juergens; Bertram Floyd
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Paper Abstract

Fiber Bragg gratings (FBG) have become preferred sensory structures in fiber optic sensing system. High sensitivity, embedability, and multiplexing capabilities make FBGs superior to other sensor configurations. The main feature of FBGs is that they respond in the wavelength domain with the wavelength of the returned signal as the indicator of the measured parameter. The wavelength is then converted to optical intensity by a photodetector to detect corresponding changes in intensity. This wavelength-to-intensity conversion is a crucial part in any FBG-based sensing system. Among the various types of wavelength-to-intensity converters, unbalanced interferometers are especially attractive be-cause of their small weight and volume, lack of moving parts, easy integration, and good stability. In this paper we investigate the applicability of unbalanced interferometers to analyze signals reflected from Bragg gratings. Analytical and experimental data are presented.

Paper Details

Date Published: 16 May 2005
PDF: 8 pages
Proc. SPIE 5758, Smart Structures and Materials 2005: Smart Sensor Technology and Measurement Systems, (16 May 2005); doi: 10.1117/12.601808
Show Author Affiliations
Grigory Adamovsky, NASA Glenn Research Ctr. (United States)
Jeff Juergens, NASA Glenn Research Ctr. (United States)
Bertram Floyd, AKIMA Corp. (United States)

Published in SPIE Proceedings Vol. 5758:
Smart Structures and Materials 2005: Smart Sensor Technology and Measurement Systems
Eric Udd; Daniele Inaudi, Editor(s)

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