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Applied Optics

Applied Optics


  • Vol. 43, Iss. 10 — Apr. 1, 2004
  • pp: 2006–2012

Use of dual-grating sensors formed by different types of fiber Bragg gratings for simultaneous temperature and strain measurements

Xuewen Shu, Donghui Zhao, Lin Zhang, and Ian Bennion  »View Author Affiliations

Applied Optics, Vol. 43, Issue 10, pp. 2006-2012 (2004)

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We report on a systematic investigation of the dependence of both temperature and strain sensitivities on the fiber Bragg grating type, including the well-known Type I, Type IIA, and a new type that we have designated Type IA, using both hydrogen-free and hydrogenated B/Ge codoped fibres. We have identified distinct sensitivity characteristics for each grating type, and we have used them to implement a novel dual-grating, dual-parameter sensor device. Three dual-grating sensing schemes with different combinations of grating type have been constructed and compared, and that of a Type IA-Type IIA combination exhibits the best performance, which is also superior to that of previously reported grating-based structures. The characteristics of the measurement errors in such dual-grating sensor systems is also presented in detail.

© 2004 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors

Original Manuscript: September 30, 2003
Revised Manuscript: December 16, 2003
Published: April 1, 2004

Xuewen Shu, Donghui Zhao, Lin Zhang, and Ian Bennion, "Use of dual-grating sensors formed by different types of fiber Bragg gratings for simultaneous temperature and strain measurements," Appl. Opt. 43, 2006-2012 (2004)

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