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Proceedings Paper

Fiber Bragg grating first- and second-order diffraction-wavelength-based transducer-optimized design
Author(s): Juan Echevarria; Francisco J. Madruga; Mauro Lomer; Jose Miguel Lopez-Higuera
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Paper Abstract

Several experimental demonstrations of a unique Fiber Bragg Grating (FBG) based transducer for strain and temperature have been made. The proposed technique is based on the inscription of an unique uniform FBG what presents first- and second-order diffraction wavelength response. The measurement of the wavelength change at both wavelengths allow the design of a simple and efficient fiber optic based transducers. Although strain-temperature discrimination feasibility have been proved previously, the errors associated to the transfer matrix must be improved to achieve a similar performance than other FBG based discrimination techniques. Up to our knowledge, theoretical analysis which allows an optimized transducer design have not been made. In this communication a generalized study of the behavior of two wavelength measurement based transducers is going to be made. Physical parameters which are involved in the transducer construction are going to be analyzed and a suitable technique for optimal transducer design is going to be proposed. Several conclusions about the relation among each FBG based transducer parameter and the transfer matrix condition are going to be presented. The measurement errors associated to this physical parameters will be derived allowing the design of optimized specific transducers.

Paper Details

Date Published: 27 June 2002
PDF: 7 pages
Proc. SPIE 4694, Smart Structures and Materials 2002: Smart Sensor Technology and Measurement Systems, (27 June 2002); doi: 10.1117/12.472615
Show Author Affiliations
Juan Echevarria, Univ. de Cantabria (Spain)
Francisco J. Madruga, Univ. de Cantabria (Spain)
Mauro Lomer, Univ. de Cantabria (Spain)
Jose Miguel Lopez-Higuera, Univ. de Cantabria (Spain)

Published in SPIE Proceedings Vol. 4694:
Smart Structures and Materials 2002: Smart Sensor Technology and Measurement Systems
Daniele Inaudi; Eric Udd, Editor(s)

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