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Proceedings Paper

Fourier transform-based absolute phase interrogation algorithm for Sagnac interferometer-based PMF sensors
Author(s): Yuxuan Chen; Yuanhong Yang; Shuo Liu; Mingwei Yang; Wei Jin
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Paper 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 0.1°C temperature resolution and up to 900°C temperature can be measured with good linearity.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96343A (28 September 2015); doi: 10.1117/12.2194642
Show Author Affiliations
Yuxuan Chen, BeiHang Univ. (China)
Yuanhong Yang, BeiHang Univ. (China)
Shuo Liu, BeiHang Univ. (China)
Mingwei Yang, BeiHang Univ. (China)
Wei Jin, The Hong Kong Polytechnic Univ. (China)


Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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