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15 November 2018 Enhancing the performance of BOTDA sensing through introducing additional pre-exhausted wavelength
Hongyan Zhao, Yongjun Wang, Qi Zhang, Feng Tian, Wenqing Tang, Tingting Yu, Xiangjun Xin
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Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 1096460 (2018) https://doi.org/10.1117/12.2506480
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China
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.
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Hongyan Zhao, Yongjun Wang, Qi Zhang, Feng Tian, Wenqing Tang, Tingting Yu, and Xiangjun Xin "Enhancing the performance of BOTDA sensing through introducing additional pre-exhausted wavelength", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 1096460 (15 November 2018); https://doi.org/10.1117/12.2506480
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KEYWORDS
Sensing systems
Sensors
Signal to noise ratio
Light scattering
Optical fibers
Signal detection
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