| 分布式光纤布里渊散射温度传感实验系统 |
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| 引用本文： | 杨志,李永倩,何玉钧,崔翔,芳野俊颜.分布式光纤布里渊散射温度传感实验系统[J].光子学报,2003,32(1):14-17. |
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| 作者姓名： | 杨志 李永倩 何玉钧 崔翔 芳野俊颜 |
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| 作者单位： | 1. 华北电力大学电子与通信工程系,保定,071003
2. 群马大学工学部电气电子工学科,日本桐生,3768515 |
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| 摘 要： | 提出一种基于布里渊光时域反射计法的分布式光纤布里渊散射温度传感系统.光源采用窄谱半导体激光器.声光调制器将光源调制成窄脉冲,并由高增益光纤放大器放大,产生高功率光脉冲信号,提高了自发布里渊散射信号的强度.采用双通马赫-曾德干涉仪将布里渊散射从瑞利散射中分离出来,在一段4.25 km长的光纤上进行分布式温度传感的实验研究.双通马赫-曾德干涉仪对瑞利散射进行了很好的抑制,得到了比较纯净的随温度变化的布里渊散射信号.
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| 关 键 词： | 光纤传感 布里渊散射 马赫-增德干涉仪 分布式温度传感 |
| 收稿时间： | 2002/1/11 |
| 修稿时间： | 2002年1月11日 |
An Experimental Distributed Temperature Sensing System Based on Optical Fiber Brillouin Scattering |
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| Yang Zhi,Li Yongqian,He Yujun,Cui Xiang,Toshihiko Yoshino.An Experimental Distributed Temperature Sensing System Based on Optical Fiber Brillouin Scattering[J].Acta Photonica Sinica,2003,32(1):14-17. |
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| Authors: | Yang Zhi Li Yongqian He Yujun Cui Xiang Toshihiko Yoshino |
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| Institution: | Yang Zhi1,Li Yongqian2,He Yujun1,Cui Xiang1,Toshihiko Yoshino2 1 Department of Electronic & Communication Engineering,North China Electric Power University,Baoding 071003 2 Department of Electronic Engineering,Engineering Faculty of Gunma University,Kiryu 376-0052,Japan Received date:20020111 |
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| Abstract: | A distributed temperature sensing system based on optical fiber Brillouin scattering was presented. A narrow line width LD was used as a light source. The light from LD was modulated by an AOM and amplified by a high gain EDFA to generate high power light pulse. Thus a high intensity spontaneous Brillouin scattering was achieved. A double-pass all-fiber Mach-Zehnder interferometer was designed and used to separate Brillouin scattering from Rayleigh scattering. Experimental studies about temperature sensing were carried out on a section of 4.25 km long optical fiber. Temperature sensing signal was obtained without the influence of Rayleigh scattering which was rejected extremely by the double-pass all-fiber Mach-Zehnder interferometer. |
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| Keywords: | Optical fiber sensor Brillouin scattering Mach-Zehnder interferometer Distributed temperature sensing |
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