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Proceedings Paper

Structure optimization of air-hole fibers for high-sensitivity fiber Bragg grating pressure sensors
Author(s): Charles Jewart; Di Xu; Kevin P. Chen; John Canning
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Paper Abstract

This paper presents sensitivity enhancement of fiber Bragg grating sensors written in two hole fibers to external hydrostatic pressure. Finite element analysis was used to optimize the size, diameter, and configuration of air holes. The fiber core was then fabricated in the region with the maximum birefringence induced by external pressure. Resonant peak splitting of fiber Bragg gratings were used to gauge the external hydrostatic pressures. By using 220-μm diameter two hole fibers with 90-μm air holes, the optimized fiber structure with a fiber core fabricated on the edge of the air hole registered 0.102 pm/psi hydrostatic pressure response, yielding 6.5 times enhancement than previously reported in two hole fibers. The sensitivity enhancement of fiber sensors is further demonstrated by controlling the size of air holes.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70041Z (16 May 2008); doi: 10.1117/12.785914
Show Author Affiliations
Charles Jewart, Univ. of Pittsburgh (United States)
Di Xu, Univ. of Pittsburgh (United States)
Kevin P. Chen, Univ. of Pittsburgh (United States)
John Canning, Univ. of Sydney (Australia)

Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors
David Sampson; Stephen Collins; Kyunghwan Oh; Ryozo Yamauchi, Editor(s)

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