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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 5,
  • Issue 3,
  • pp. 135-137
  • (2007)

Multiplexed reflective-matched optical fiber grating interrogation technique

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Abstract

The multiplexed-reflective matched fiber grating interrogation technique was presented in this paper. The interrogation technique was based on the use of two (or more) wavelength-matched fiber Bragg gratings (FBGs) to receive the reflected signal from the sensing FBG. The two (or more) matched gratings were arranged parallelly and used as filters to convert wavelength into intensity encoded information for interrogation. Theoretical and experimental results demonstrated that the interrogation system is immune to the source fluctuation and cross-sensitivity effect between temperature and strain, and also can enlarge the dynamic range.

© 2007 Chinese Optics Letters

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