Paper
14 November 2016 Demonstration of distributed fiber-optic temperature sensing with PM fiber using polarization crosstalk analysis technique
Hongxin Su, Ziwei Zhao, Ting Feng, Dongliang Ding, Zhihong Li, X. Steve Yao
Author Affiliations +
Abstract
Polarization crosstalk is a phenomenon that the powers of two orthogonal polarization modes propagating in a polarization maintaining (PM) fiber couple into each other. Because there is certain mathematical relationship between the polarization crosstalk signals and external perturbations such as stress and temperature variations, stress and temperature sensing in PM fiber can be simultaneously achieved by measuring the strengths and locations of polarization crosstalk signals. In this paper, we report what we believe the first distributed temperature sensing demonstration using polarization crosstalk analysis in PM fibers. Firstly, by measuring the spacing changes between two crosstalk peaks at different fiber length locations, we obtained the temperature sensing coefficient (TSC) of approximately −0.73 μm/(°C•m), which means that the spacing between two crosstalk peaks induced at two locations changes by 0.73 μm when the temperature changes by 1 °C over a fiber length of 1 meter. Secondly, in order to bring different temperature values at different axial locations along a PM fiber to verify the distributed temperature sensing, four heating-strips are used to heat different fiber sections of the PM fiber under test, and the temperatures measured by the proposed fiber sensing method according to the obtained TSC are almost consistent with those of heating-strips measured by a thermoelectric thermometer. As a new type of distributed fiber temperature sensing technique, we believe that our method will find broad applications in the near future.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hongxin Su, Ziwei Zhao, Ting Feng, Dongliang Ding, Zhihong Li, and X. Steve Yao "Demonstration of distributed fiber-optic temperature sensing with PM fiber using polarization crosstalk analysis technique", Proc. SPIE 10025, Advanced Sensor Systems and Applications VII, 100251F (14 November 2016); https://doi.org/10.1117/12.2246217
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Cited by 2 scholarly publications.
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KEYWORDS
Phase modulation

Temperature metrology

Polarization

Glasses

Sensing systems

Thermoelectric materials

Fiber optics sensors

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