| 光纤分布式扰动传感器中瑞利和受激布里渊散射光谱特性及其影响研究 |
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| 作者姓名： | Zhang CX Liang S Feng XJ Lin WT Li C Li Q Zhong X Li LJ |
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| 作者单位： | 北京航空航天大学仪器科学与光电工程学院,北京,100191 |
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| 基金项目： | 北京航空航天大学博士研究生创新基金 |
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| 摘 要： | 针对光纤分布式扰动传感器长距离应用定位误差增大的问题,研究了传感器长距离光纤中的瑞利散射和受激布里渊散射的光谱特性及其对系统定位精度的影响.建立了长距离光纤中瑞利和受激布里渊散射的数学模型,通过仿真研究发现散射光波的杂波干涉和强度噪声会严重降低干涉仪的光学信噪比,从而导致定位误差.通过实验验证了仿真结果的正确性.研究结...
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| 关 键 词： | 光纤分布式扰动传感器 马赫-泽德干涉仪 瑞利散射 受激布里渊散射 定位误差 光谱特性 |
Spectra and influences of Rayleigh and stimulated Brillouin scattering in fiber-optic distributed disturbance sensor |
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| Zhang CX,Liang S,Feng XJ,Lin WT,Li C,Li Q,Zhong X,Li LJ.Spectra and influences of Rayleigh and stimulated Brillouin scattering in fiber-optic distributed disturbance sensor[J].Spectroscopy and Spectral Analysis,2011,31(7):1862-1867. |
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| Authors: | Zhang Chun-xi Liang Sheng Feng Xiu-juan Lin Wen-tai Li Chen Li Qin Zhong Xiang Li Li-jing |
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| Institution: | School of Instrument Science and Opto-Electronics Engineering, Beihang University, Beijing 100191, China. zchunxi@hotmail.com |
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| Abstract: | Spectra and influences of Rayleigh backscattering (RB) and stimulated Brillouin scattering (SBS) in the fiber-optic distributed disturbance sensor (FDDS) were investigated. Models of RB, double RB (DRB) and SBS in long fibers were established. By numerical simulation, it was found that optical signal-to-noise ratio is extraordinarily reduced due to SBS and RB, which results in location errors. Numerical results were confirmed by experiments and helpful to improving the location precision for applications with long monitored length. |
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