Dual-cavity interferometric wavelength-shift detection for in-fiber Bragg grating sensors

Y.J. Rao, D.A. Jackson, L. Zhang, I. Bennion

Research output: Contribution to journalArticle

Abstract

A dual-cavity interrogation method used to enhance the unambiguous measurement range of in-fiber Bragg grating sensors with high-resolution interferometric wavelength-shift detection is described. This novel technique is based on the use of two sets of fringes obtained with a stepped interferometric wavelength scanner with dual cavity lengths. We demonstrate the concept by interrogating an in-fiber grating temperature sensor with a stepped Michelson wavelength scanner. © 1996 Optical Society of America.

Original languageEnglish
Pages (from-to)1556-1558
Number of pages3
JournalOptics Letters
Volume21
Issue number19
DOIs
Publication statusPublished - 1 Oct 1996

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