| 单模保偏光纤偏振测试方法 |
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| 引用本文： | 郎晓萍,李晓英. 单模保偏光纤偏振测试方法[J]. 北京机械工业学院学报, 2005, 20(1): 25-27 |
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| 作者姓名： | 郎晓萍 李晓英 |
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| 作者单位： | 北京机械工业学院电子信息工程系 北京100085(郎晓萍)，北京机械工业学院电子信息工程系 北京100085(李晓英) |
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| 摘 要： | 随着单模光纤应用技术的不断发展,偏振特性已经成为影响光纤应用的一个决定性因素.单模保偏光纤可实现光束在光纤传输过程中偏振态保持不变,是目前应用极为广泛的光纤类型.介绍了保偏光纤偏振传输的原理及消光比的定义,设计了一套测量单模保偏光纤消光比的测量装置,并阐述了系统结构及关键技术问题的解决.最后用设计的系统对保偏光纤进行了测试,得到了光纤的相对输出功率与偏转角度的关系,3 m长的保偏光纤的消光比达到了42 dB.
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| 关 键 词： | 单模光纤 保偏光纤 消光比 |
| 文章编号： | 1008-1658(2005)01-0025-03 |
| 修稿时间： | 2004-10-09 |
Research on polarization measurement method of Single-mode PM fiber |
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| LANG Xiao-ping,LI Xiao-ying. Research on polarization measurement method of Single-mode PM fiber[J]. Journal of Beijing Institute of Machinery, 2005, 20(1): 25-27 |
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| Authors: | LANG Xiao-ping LI Xiao-ying |
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| Abstract: | With the development of fiber application technologies, the property of polarization has become a crucial factor to affect its application. PM fiber can conserve the polarization for propagating beam inside, which makes it the most widely applied fiber nowadays. The propagation theory and the definition of extinction ratio about PM fiber are presented, and a setup for measuring extinction ratio is designed. The system structure and the solution of key technical problems are also discussed in the paper. At last, a test of PM fiber is performed based on the designed system. A relation between related output power and rotation angle of fiber is obtained and the extinction ratio is 42dB for a 3m PM fiber. |
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| Keywords: | Single-mode fiber PM(polarization maintaining)optical fiber extinction ratio |
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