Discrimination between strain and temperature effects using first and second-order diffraction from a long-period grating

Thomas D.P. Allsop*, Lin Zhang, David J. Webb, Ian Bennion

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

We study the effects of temperature and strain on the spectra of the first and second-order diffraction attenuation bands of a single long-period grating (LPG) in step-index fibre. The primary and second-order attenuation bands had comparable strength with the second-order bands appearing in the visible and near-infra red parts of the spectrum. Using first and second-order diffraction to the eighth cladding mode a sensitivity matrix was obtained with limiting accuracy given by cross-sensitivity of ∼ 1.19% of the measurement. The sensing scheme presented as a limiting temperature and strain resolution of ± 0.7 °C and ∼ ± 25 με. © 2002 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)103-108
Number of pages6
JournalOptics Communications
Volume211
Issue number1-6
DOIs
Publication statusPublished - 1 Oct 2002

Keywords

  • long-period fibre grating
  • second-order diffraction
  • strain and temperature sensing

Fingerprint Dive into the research topics of 'Discrimination between strain and temperature effects using first and second-order diffraction from a long-period grating'. Together they form a unique fingerprint.

  • Cite this