| 光脉冲编码对基于拉曼放大的布里渊光时域分析系统的影响 |
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| 引用本文： | 张超,饶云江,贾新鸿,邓坤,苌亮,冉曾令.光脉冲编码对基于拉曼放大的布里渊光时域分析系统的影响[J].物理学报,2011,60(10):104211-104211. |
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| 作者姓名： | 张超 饶云江 贾新鸿 邓坤 苌亮 冉曾令 |
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| 作者单位： | 电子科技大学通信与信息工程学院,光纤传感与通信教育部重点实验室,成都 611731 |
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| 基金项目： | 国家高技术研究发展计划(批准号:2007AA01Z245)资助的课题. |
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| 摘 要： | 报道了光脉冲编码对基于拉曼放大的布里渊光时域分析系统(BOTDA)的影响. 实验表明,光脉冲编码能够在保证较高空间分辨率的同时减小布里渊频移的不确定性. 实验实现了49.6 km传感距离, 在整段传感光纤上温度分辨率1 ℃,空间分辨率2.5 m. 本文实验测量并分析了系统的信噪比和光功率分布特性.
关键词：
分布式光纤传感
受激拉曼散射
布里渊增益
布里渊光时域分析系统(BOTDA)
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| 关 键 词： | 分布式光纤传感 受激拉曼散射 布里渊增益 布里渊光时域分析系统(BOTDA) |
| 收稿时间： | 2010-11-16 |
Influence of optical simple pulse coding on the Brillouin optical time domain analyzer based on bi-directional Raman amplification |
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| Zhang Chao,Rao Yun-Jiang,Jia Xin-Hong,Deng Kun,Chang Liang and Ran Zeng-Ling.Influence of optical simple pulse coding on the Brillouin optical time domain analyzer based on bi-directional Raman amplification[J].Acta Physica Sinica,2011,60(10):104211-104211. |
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| Authors: | Zhang Chao Rao Yun-Jiang Jia Xin-Hong Deng Kun Chang Liang and Ran Zeng-Ling |
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| Institution: | Key Laboratory of Optical Fiber Sensing & Communications, Ministry of Education, School of Communication & Information Engineering, University of Electronic Science & Technology of China, Chengdu 611731, China;Key Laboratory of Optical Fiber Sensing & Communications, Ministry of Education, School of Communication & Information Engineering, University of Electronic Science & Technology of China, Chengdu 611731, China;Key Laboratory of Optical Fiber Sensing & Communications, Ministry of Education, School of Communication & Information Engineering, University of Electronic Science & Technology of China, Chengdu 611731, China;Key Laboratory of Optical Fiber Sensing & Communications, Ministry of Education, School of Communication & Information Engineering, University of Electronic Science & Technology of China, Chengdu 611731, China;Key Laboratory of Optical Fiber Sensing & Communications, Ministry of Education, School of Communication & Information Engineering, University of Electronic Science & Technology of China, Chengdu 611731, China;Key Laboratory of Optical Fiber Sensing & Communications, Ministry of Education, School of Communication & Information Engineering, University of Electronic Science & Technology of China, Chengdu 611731, China |
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| Abstract: | We report the influence of optical simple pulse coding on the Brillouin optical time domain analyzer (BOTDA) based on bi-directional Raman amplification. This method is proposed to reduce the frequency uncertainty in long-distance BOTDA under higher spatial resolution. The experimental characterization of 49.6 km temperature sensing with a measurement accuracy of ~1 ℃ under ~2.5 m spatial resolution over the whole length of sensing fiber is demonstrated. The signal-to-noise ratio (SNR) and the optical signal power distribution characteristics of the system are studied experimentally in this paper. |
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| Keywords: | distributed optical fiber sensing stimulated Raman scattering Brillouin gain Brillouin optical time domain analyzer (BOTDA) |
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