| 基于相关序列脉冲的布里渊光时域反射测量系统解码方法研究 |
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| 引用本文： | 梁浩,路元刚,李存磊,王祥传,张旭苹.基于相关序列脉冲的布里渊光时域反射测量系统解码方法研究[J].光学学报,2011(10):69-74. |
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| 作者姓名： | 梁浩 路元刚 李存磊 王祥传 张旭苹 |
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| 作者单位： | 南京大学光通信工程研究中心; |
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| 基金项目： | 国家自然科学基金(61027017,60644001); 国家973计划(2010CB327803)资助课题 |
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| 摘 要： | 布里渊光时域反射测量(BOTDR)系统空间分辨率和传感距离存在相互制约的关系.相关序列脉冲编码技术可用于解决这一矛盾,但直接对编码脉冲的布里渊散射采样信号进行解码,会因采样时间间隔小于编码单位脉冲宽度而导致解码信号的失真,从而降低了系统空间分辨率和测量精度.分析了直接互相关解码对BOTDR系统空间分辨率的影响,提出一种...
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| 关 键 词： | 光纤传感 布里渊光时域反射 相关序列 编码脉冲 采样率 |
Study on Decoding Method of Correlation Coded Pulses Based Brillouin Optical Time-Domain Reflectometric System |
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| Liang Hao Lu Yuangang Li Cunlei Wang Xiangchuan Zhang Xuping.Study on Decoding Method of Correlation Coded Pulses Based Brillouin Optical Time-Domain Reflectometric System[J].Acta Optica Sinica,2011(10):69-74. |
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| Authors: | Liang Hao Lu Yuangang Li Cunlei Wang Xiangchuan Zhang Xuping |
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| Institution: | Liang Hao Lu Yuangang Li Cunlei Wang Xiangchuan Zhang Xuping(Institute of Optical Communication Engineering,Nanjing University,Nanjing,Jiangsu 210093,China) |
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| Abstract: | There is a trade-off between spatial resolution and sensing range of conventional Brillouin optical time domain reflectometry(BOTDR) system.Correlation coded pulses encoding technique has been used to solve this problem.However,when the sampling duration is smaller than the unit pulse width,the restored traces might be distorted by using direct correlation decoded method,thus it will decrease the spatial resolution and accuracy of the system.The influence of the direct correlation based decoded method on th... |
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| Keywords: | optical fiber sensor Brillouin optical time domain reflectometry correlation sequence coded pulse sampling rate |
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