| 少模光纤干涉仪中光纤对准偏差的研究 |
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| 引用本文： | 邓路, 阮德金, 杨春,.少模光纤干涉仪中光纤对准偏差的研究[J].电子器件,2007,30(2):600-603. |
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| 作者姓名： | 邓路 阮德金 杨春 |
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| 作者单位： | 光子学与光通信研究室,东南大学电子科学与工程学院,南京,210096;光子学与光通信研究室,东南大学电子科学与工程学院,南京,210096;光子学与光通信研究室,东南大学电子科学与工程学院,南京,210096 |
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| 摘 要： | 本文利用数值仿真研究了少模光纤干涉仪中少模光纤与单模光纤的对准偏差对调制深度的影响.基于阶跃折射率光纤的矢量波动方程,数值求解导模的场分布.按无对准偏差时对光纤参数进行优化,使调制深度达到1.数值仿真了单模光纤偏心激励少模光纤情况下,少模光纤中的模式功率分布.仿真结果表明可用光功率检测的方法辅助少模光纤和单模光纤对准熔接,当光功率控制在极小值2%范围内时,横向对准偏差小于3微米.论文仿真了少模光纤干涉仪中光纤熔接对准误差与调制深度的关系.结果表明,当对准偏差小于3μm时,调制深度大于96%;当对准偏差大于4μm后,调制深度随对准偏差的增大而急剧减小.
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| 关 键 词： | 少模光纤 干涉仪 调制深度 对准偏差 |
| 文章编号： | 1005-9490(2007)02-0600-04 |
| 修稿时间： | 2006年9月21日 |
Study on Misalignment in a Few-Mode Optical Fiber Interferometer |
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| DENG Lu,RUAN De-Jin,YANG Chun.Study on Misalignment in a Few-Mode Optical Fiber Interferometer[J].Journal of Electron Devices,2007,30(2):600-603. |
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| Authors: | DENG Lu RUAN De-Jin YANG Chun |
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| Affiliation: | Lab of Photonics and Optical Communications,Electronic Science and Engineering College,Southeast University,Nanjing 210096,China |
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| Abstract: | Few-mode fiber(FMF)interferometer is numerically studied.Vector eigen-modes of step-index fiber were solved numerically.The parameters of FMF interferometer were optimized to let DM=1,under condition of no misalignment.Modal power distribution of FMF under offset-launching by single mode fiber(SMF)was calculated.The result indicates that the SMF to FMF offset can be controlled within 3 micron by monitoring the total guided power in FMF while launching an incoherent light from SMF into FMF.Influence of misalignment between SMF and FMF on depth of modulation(DM)was calculated.It is indicated that DM is over 96% while offset is less than 3 micron and DM decreases rapidly with the increase of offset beyond 3.7 micron. |
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| Keywords: | few-mode fiber interferometer depth of modulation misalignment |
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