Novel wavelength demodulation scheme for fiber Bragg grating sensors based on adaptive two-wave mixing interferometry

Yi Qiao*, Sridhar Krishnaswamy

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

In this paper, we demonstrate a novel method to demodulate the wavelength shift caused by dynamic strains applied on fiber Bragg grating (FBG) sensors. This scheme is based on two-wave mixing (TWM) interferometry in a photorefractive InP: Fe crystal. The wavelength shift of the FBG sensor is first converted into phase shift and then demodulated by the TWM interferometer. The uniqueness of this scheme lies in that it is adaptive to quasistatic strain, which enables this scheme to function without any feedback electronics that other demodulation schemes need. We demonstrate that the TWM wavelength demodulator has a cut-off frequency of 600Hz.

Original languageEnglish (US)
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation
Subtitle of host publicationVolume 25B
Pages1710-1717
Number of pages8
DOIs
StatePublished - Mar 6 2006
EventReview of Progress in Quantitative Nondestructive - Brunswick, ME, United States
Duration: Jul 31 2005Aug 5 2005

Publication series

NameAIP Conference Proceedings
Volume820 II
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherReview of Progress in Quantitative Nondestructive
CountryUnited States
CityBrunswick, ME
Period7/31/058/5/05

Keywords

  • Fiber Bragg grating
  • Photorefractive
  • Wavelength demodulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Novel wavelength demodulation scheme for fiber Bragg grating sensors based on adaptive two-wave mixing interferometry'. Together they form a unique fingerprint.

Cite this