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Proceedings Paper

Application of the probe pulse with ergodic SOPs in detecting multi-vibrations using POTDR
Author(s): Jintao Hu; Xiangchuan Wang; Shilong Pan
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Paper Abstract

Polarization Optical Time Domain Reflectometer (POTDR) can be used to detect the external vibration information by measuring the change of state of polarization (SOP) of the Rayleigh backscattering along the sensing fiber. However, the traditional POTDR system is suffer from the false negative when the vibrations along the fiber are with the same frequency. In this article, we propose and numerically simulated a scheme of POTDR system which can be used to detect multi-vibration with the same frequency. By scanning the SOP of the probe pulse, a series of vibration spectra along the fiber are obtained. The sum of these vibration spectra whose amplitudes are theoretical immune to certain SOP of the probe pulse and birefringence of the sensing fiber is used to analyze the external vibration information. The proposed system with input SOPs of uniform distribution and random distribution are analyzed by numerical simulation, respectively. The misdiagnosis rate of detecting multi-vibrations with different frequencies are greatly reduced. In addition, multi-vibrations with same frequency detection system using POTDR is successfully achieved by analyzing the amplitude change of the add up spectra along the sensing fiber, which would greatly promote the development of POTDR.

Paper Details

Date Published: 10 January 2018
PDF: 7 pages
Proc. SPIE 10618, 2017 International Conference on Optical Instruments and Technology: Advanced Optical Sensors and Applications, 1061805 (10 January 2018); doi: 10.1117/12.2295319
Show Author Affiliations
Jintao Hu, Nanjing Univ. of Aeronautics and Astronautics (China)
Xiangchuan Wang, Nanjing Univ. of Aeronautics and Astronautics (China)
Shilong Pan, Nanjing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 10618:
2017 International Conference on Optical Instruments and Technology: Advanced Optical Sensors and Applications
Xuping Zhang; Hai Xiao; Francisco Javier Arregui; Liquan Dong, Editor(s)

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