Fiber Bragg grating first- and second-order diffraction-wavelength-based transducer-optimized design

Juan Echevarria; Francisco J. Madruga; Mauro Lomer; Jose Miguel Lopez-Higuera

doi:10.1117/12.472615

27 June 2002 Fiber Bragg grating first- and second-order diffraction-wavelength-based transducer-optimized design

Juan Echevarria, Francisco J. Madruga, Mauro Lomer, Jose Miguel Lopez-Higuera

Proceedings Volume 4694, Smart Structures and Materials 2002: Smart Sensor Technology and Measurement Systems; (2002) https://doi.org/10.1117/12.472615
Event: SPIE's 9th Annual International Symposium on Smart Structures and Materials, 2002, San Diego, California, United States

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.

Citation Download Citation

Juan Echevarria, Francisco J. Madruga, Mauro Lomer, and Jose Miguel Lopez-Higuera "Fiber Bragg grating first- and second-order diffraction-wavelength-based transducer-optimized design", Proc. SPIE 4694, Smart Structures and Materials 2002: Smart Sensor Technology and Measurement Systems, (27 June 2002); https://doi.org/10.1117/12.472615

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