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Enhancing the performance of BOTDA sensing through introducing additional Pre-exhausted wavelength
Author(s): Hongyan Zhao; Yongjun Wang; Qi Zhang; Feng Tian; Wenqing Tang; Tingting Yu; Xiangjun Xin
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Paper Abstract

This paper presents and experimentally demonstrates a novel scheme of Brillouin optical time domain analysis (BOTDA) sensing system to ensure the encoded pulse waveform amplified from EDFA is flat. This system also can eliminate the noise by introducing additional pre-exhausted wavelength at the laser. The experiment results indicate that this dual-wavelength pump light scheme can easily shape the Lorenz curve between Brillouin gain spectrum(BGS) and scan frequencies without any extra processing, compared to normal BOTDA system with single-wavelength pump light. The new scheme can also improve the intensity of Brillouin signal about 50mV as well as the frequency shift accuracy is increased by 5MHz, which is benefit for increasing sensing range and measurement accuracy.

Paper Details

Date Published: 15 November 2018
PDF: 5 pages
Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 1096460 (15 November 2018); doi: 10.1117/12.2506480
Show Author Affiliations
Hongyan Zhao, Beijing Univ. of Posts and Telecommunications (China)
Yongjun Wang, Beijing Univ. of Posts and Telecommunications (China)
Qi Zhang, Beijing Univ. of Posts and Telecommunications (China)
Feng Tian, Beijing Univ. of Posts and Telecommunications (China)
Wenqing Tang, Beijing Univ. of Posts and Telecommunications (China)
Tingting Yu, Beijing Univ. of Posts and Telecommunications (China)
Xiangjun Xin, Beijing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 10964:
Tenth International Conference on Information Optics and Photonics
Yue Yang, Editor(s)

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