| 复合调制长周期光栅耦合器的研究 |
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| 引用本文： | 董小伟,江微微,范林勇,赵瑞峰,盛晓娟.复合调制长周期光栅耦合器的研究[J].中国激光,2011(5). |
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| 作者姓名： | 董小伟 江微微 范林勇 赵瑞峰 盛晓娟 |
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| 作者单位： | 北京交通大学光波技术研究所; |
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| 基金项目： | 国家自然科学基金(61007007); 中央高校基础科研业务费专项基金(2011JBM014)资助课题 |
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| 摘 要： | 从麦克斯韦方程出发,推导了长周期光栅耦合器在折射率、增益、损耗复合调制下完整的耦合理论模型。在此基础上,详细分析了该复合调制长周期光栅耦合器直通与交叉臂间的功率耦合和多波长滤波特性。结果表明,当增益/损耗调制与折射率调制作用相等时,复合调制长周期光栅耦合器具有单向非互易的功率耦合特性,而且随着多波长复用信号输入光纤和输入方向的不同,具有不同的上下话路滤波特性。在增益调制作用下,满足相位匹配条件的信号不仅可有效地耦合到交叉臂下话路输出,还能得到明显的放大;但当损耗调制时,直通与交叉臂中的信号功率均保持各自的初值,而且不再具备波长选择滤波能力。
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| 关 键 词： | 光纤光栅 长周期光栅耦合器 复合调制 单向 非互易 上下话路滤波器 |
Study on Complex-Modulated Long-Period-Grating-Coupler |
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| Dong Xiaowei Jiang Weiwei Fan Linyong Zhao Ruifeng Sheng Xiaojuan.Study on Complex-Modulated Long-Period-Grating-Coupler[J].Chinese Journal of Lasers,2011(5). |
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| Authors: | Dong Xiaowei Jiang Weiwei Fan Linyong Zhao Ruifeng Sheng Xiaojuan |
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| Affiliation: | Dong Xiaowei Jiang Weiwei Fan Linyong Zhao Ruifeng Sheng Xiaojuan(Institute of Lightwave Technology,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | The unified coupled-mode theory for long-period-grating-coupler is obtained by deriving directly from Maxwell's equation when all the modulation effects of refractive-index,gain and loss are considered.Then,the characteristics of power coupling and signal filtering between the straight-arm and cross-arm of complex-modulated long-period-grating-coupler are investigated thoroughly.The results demonstrate that monodirectional nonreciprocal power coupling is shown when gain/loss is equal with refractive-index m... |
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| Keywords: | fiber grating long-period-grating-coupler complex-modulated monodirectional nonreciprocal add/drop filter |
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