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, Ian Bennion

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)2006-2012
Number of pages7
JournalApplied Optics
Volume43
Issue number10
DOIs
Publication statusPublished - Apr 2004

Bibliographical note

© 2004 Optical Society of America
This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-10-2006. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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