基于多频率综合鉴别phi-OTDR系统中干涉衰落假信号的相位解调技术 | |
周俊; 潘政清; 叶青; 蔡海文; 赵浩; 瞿荣辉; 方祖捷 | |
刊名 | 中国激光 |
2013 | |
卷号 | 40期号:9页码:905003 |
其他题名 | Phase Demodulation Technology Using a Multi-Frequency Source for Discrimination of Interference-Fading Induced False Alarms in a phi-OTDR System |
通讯作者 | 周俊, 中国科学院上海光学精密机械研究所, 上海市全固态激光器与应用技术重点实验室, 上海 201800, 中国. ; 潘政清, 中国科学院上海光学精密机械研究所, 上海市全固态激光器与应用技术重点实验室, 上海 201800, 中国. ; 叶青, 中国科学院上海光学精密机械研究所, 上海市全固态激光器与应用技术重点实验室, 上海 201800, 中国. ; 蔡海文, 中国科学院上海光学精密机械研究所, 上海市全固态激光器与应用技术重点实验室, 上海 201800, 中国. ; 瞿荣辉, 中国科学院上海光学精密机械研究所, 上海市全固态激光器与应用技术重点实验室, 上海 201800, 中国. ; 方祖捷, 中国科学院上海光学精密机械研究所, 上海市全固态激光器与应用技术重点实验室, 上海 201800, 中国. ; 赵浩, 上海波汇通信科技有限公司, 上海 201203, 中国. |
中文摘要 | 对相位解调相位敏感光时域反射仪(phi-OTDR)系统中干涉衰落问题进行了研究。同一频率多次脉冲扫描显示出相似的衰落波形,而不同光频有不同的衰落波形。通过改进现有瑞利散射随机性和相干性物理模型,推出了瑞利散射系数是激光频率和有效折射率的函数,合理解释了上述实验现象。为了消除干涉衰落导致的系统误报问题,提出了一种基于多频率综合判决的方法,有效地区分并排除了误报,提高了整个phi-OTDR系统相位解调的准确性。 |
英文摘要 | The characteristics of interference fading in the phase-demodulated phase-sensitive optical time domain reflectometer(phi-OTDR) system are investigated. It is found that the fading waveforms have high similarity for different pulse scans, but obvious differences for different optical frequencies. An improved model for randomness and coherent noise of Rayleigh scattering is presented. It can be concluded that the composite Rayleigh scattering coefficient is a function of laser frequency and the index distribution, which could explain the experimental results reasonably. In order to eliminate the false alarms due to interference fading, a multi-frequency method is proposed, which can improve the accuracy of the phase demodulation in the phi-OTDR system. |
收录类别 | EI |
语种 | 中文 |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.siom.ac.cn/handle/181231/14946] |
专题 | 上海光学精密机械研究所_空间激光信息技术研究中心 |
作者单位 | 1.Zhou Jun, Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China. 2.Pan Zhengqing, Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China. 3.Ye Qing, Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China. 4.Cai Haiwen, Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China. 5.Qu Ronghui, Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China. 6.Fang Zujie, Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China. 7.Zhao Hao, Shanghai Bandweaver Communication Technologies Co.,Ltd., Shanghai 201203, China. |
推荐引用方式 GB/T 7714 | 周俊,潘政清,叶青,等. 基于多频率综合鉴别phi-OTDR系统中干涉衰落假信号的相位解调技术[J]. 中国激光,2013,40(9):905003. |
APA | 周俊.,潘政清.,叶青.,蔡海文.,赵浩.,...&方祖捷.(2013).基于多频率综合鉴别phi-OTDR系统中干涉衰落假信号的相位解调技术.中国激光,40(9),905003. |
MLA | 周俊,et al."基于多频率综合鉴别phi-OTDR系统中干涉衰落假信号的相位解调技术".中国激光 40.9(2013):905003. |
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