| 采用光滤波器的边缘检测布里渊光纤传感系统 |
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| 引用本文： | 万生鹏,何赛灵,胡建东.采用光滤波器的边缘检测布里渊光纤传感系统[J].传感技术学报,2005,18(2):371-373. |
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| 作者姓名： | 万生鹏 何赛灵 胡建东 |
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| 作者单位： | 浙江大学,现代光学仪器国家重点实验室,光及电磁波研究中心,杭州,310027;南昌航空工业学院,南昌,330034;浙江大学,现代光学仪器国家重点实验室,光及电磁波研究中心,杭州,310027 |
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| 摘 要： | 提出了采用边缘光滤波器来测量光纤传感中布里渊频域的方案.分析了影响布里渊频移测量精度的因素,给出了布里渊频移测量精度和信噪比的关系.结果表明,在热噪声近似下,布里渊频移测量精度与热噪声、边缘光滤波器透射函数的导数及布里渊散射光信号功率有关.
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| 关 键 词： | 分布式光纤传感 边缘光滤波器 布里渊频移测量精度 信噪比 |
| 文章编号： | 1005-9490(2005)02-0371-03 |
| 修稿时间： | 2004年9月27日 |
Edge Detection Brillouin Fiber Sensor System with Optical Filter |
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| WA N S hengpeng,H E S ail i ng,HU J i andong.Edge Detection Brillouin Fiber Sensor System with Optical Filter[J].Journal of Transduction Technology,2005,18(2):371-373. |
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| Authors: | WA N S hengpeng H E S ail i ng HU J i andong |
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| Affiliation: | 1. Center of Optical & Elect romagnetic Research , S tate of Key L aboratory of Modern Optical I nst rumentat ion ,
Zhej iang Universit y , Hangz hou 310027 , China;
2. N anchang I nst itute of Aeronautical Technology , N anchang 330034 , China |
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| Abstract: | The scheme of measuring Brillouin frequency shift in fiber sensor based on edge optical filter is proposed. The factors affecting on the measurement accuracy of Brillouin frequency shift are analyzed, the relation between the measurement of Brillouin frequency shift and signal to noise (SNR) is obtained. The results indicate that, under the thermal noise approximation, the measurement accuracy of Brillouin frequency shift is dependent on thermal noise, the derivative of the transmission function of the edge optical filter and the power of Brillouin scattering optical signal. |
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| Keywords: | distributed fiber sensing edge optical filter measurement accuracy of brillouin frequency shif SNR |
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