| 偏振态对光纤传感系统检测泄漏点灵敏度的影响 |
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| 引用本文： | 孙文韬,杭利军,胡曙阳,吴斌,宋晏蓉.偏振态对光纤传感系统检测泄漏点灵敏度的影响[J].光子学报,2008,37(4):709-712. |
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| 作者姓名： | 孙文韬 杭利军 胡曙阳 吴斌 宋晏蓉 |
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| 作者单位： | 1. 北京工业大学,应用数理学院,北京,100022
2. 北京工业大学,机械工程与应用电子技术学院,北京,100022 |
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| 基金项目： | 国家自然科学基金
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北京市自然科学基金 |
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| 摘 要： | 采用一种基于Sagnac干涉仪原理的分布式光纤声学传感系统对长距离管道泄漏进行检测,主要分析和研究了不同的输入偏振态对输出光功率的影响.当信号光场与本振光场的偏转态一致时,可得到高灵敏度接收;当信号光场和本振光场的偏振态正交时,检测不到泄漏信号.在系统长度10.044 km时,测得的零点频率是在20 kHz,根据理论公式计算的泄漏点位置在5 km处,与实际的泄漏点的位置5.022 km处,比较相近,相对误差为0.44%.
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| 关 键 词： | 光纤传感 Sagnac干涉仪 偏振控制器 泄漏 |
| 文章编号： | 1004-4213(2008)04-0709-4 |
| 收稿时间： | 2006-11-16 |
| 修稿时间： | 2006年11月16 |
Influence of Polarization Controller on Precision Position of the Leakage in Optical Fiber Sensor Systems |
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| SUN Wen-tao,HANG Li-jun,HU Shu-yang,WU Bin,SONG Yan-rong.Influence of Polarization Controller on Precision Position of the Leakage in Optical Fiber Sensor Systems[J].Acta Photonica Sinica,2008,37(4):709-712. |
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| Authors: | SUN Wen-tao HANG Li-jun HU Shu-yang WU Bin SONG Yan-rong |
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| Abstract: | A measurement of the leakage position in a distributed optical fiber acoustic sensor system based on Sagnac interferometer is demonstrated. The effect of the input polarization on the output power of the demodulated signal is researched theoretically and experimentally. The influence of the polarization of the signal and the reference on the measurement sensitivity is calculated. Theoretical analysis and experimental simulation are carried out. The results show that, when the system is 10.044 km long, the least frequency measured is 20 kHz and the calculated leakage position is 5 km, which is close to the real leakage position of 5. 022 km. The relative difference is 0. 44%. |
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| Keywords: | Optical fiber sensor Sagnac interferometer Polarization controller Leakage |
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