Fourier transform-based absolute phase interrogation algorithm for Sagnac Interferometer-based PMF Sensors

Yuxuan Chen, Yuanhong Yang, Shuo Liu, Mingwei Yang, Wei Jin

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

A high resolution and absolute phase interrogation algorithm for Sagnac interferometer based polarization maintaining fiber (PMF) sensor is proposed. Taking wavenumber instead of wavelength as the function variable, the output spectrum will be a standard cosine spectrum function. After Fourier transform, the frequency and relative phase of this spectrum function can be obtained and the precise absolute phase due to optical path difference between the two polarization modes in sensing PMF can be determined. A typical Sagnac interferometer based PMF temperature sensor was built and the absolute phase was determined by use of the proposed algorithm. Experiments show that 0.1oC temperature resolution and up to 900 oC temperature can be measured with good linearity.
Original languageEnglish
Title of host publication24th International Conference on Optical Fibre Sensors, OFS 2015
PublisherSPIE
Volume9634
ISBN (Electronic)9781628418392
DOIs
Publication statusPublished - 1 Jan 2015
Event24th International Conference on Optical Fibre Sensors, OFS 2015 - Pestana Hotel and Convention Centre, Curitiba, Brazil
Duration: 28 Sep 20152 Oct 2015

Conference

Conference24th International Conference on Optical Fibre Sensors, OFS 2015
Country/TerritoryBrazil
CityCuritiba
Period28/09/152/10/15

Keywords

  • Absolute phase interrogation
  • Fourier transform
  • Optical fiber sensor
  • Sagnac interferometers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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