Strain and temperature characteristics of a long-period grating written in a photonic crystal fiber and its application as a temperature-insensitive strain sensor

Chun Liu Zhao, Limin Xiao, Jian Ju, M. S. Demokan, Wei Jin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

75 Citations (Scopus)

Abstract

Strain and temperature characteristics of a long-period grating (LPG) written in an endless-single-mode photonic crystal fiber (ESM-PCF) are investigated theoretically and experimentally. By use of a dispersion factor γ, a deeper understanding of the behavior of LPG in the ESM-PCF is achieved. The negative strain sensitivity of the LPG is explained by the negative value of the dispersion factor γ. Our analysis clearly reveals the significant effect of the waveguide dispersive characteristics of the cladding modes on the strain and temperature characteristics of the LPG in the ESM-PCF. By selecting an appropriate grating period, a simple, low-cost LPG sensor with approximately zero temperature sensitivity but large strain sensitivity is realized.
Original languageEnglish
Pages (from-to)220-227
Number of pages8
JournalJournal of Lightwave Technology
Volume26
Issue number2
DOIs
Publication statusPublished - 15 Jan 2008

Keywords

  • Long-period grating
  • Optical fiber sensor
  • Photonic crystal fiber
  • Strain and temperature sensitivity
  • Strain sensor

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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