| 大模场啁啾光纤光栅的光谱特性 |
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| 引用本文： | 赵保银,段开椋,赵卫.大模场啁啾光纤光栅的光谱特性[J].强激光与粒子束,2011,23(7). |
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| 作者姓名： | 赵保银 段开椋 赵卫 |
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| 作者单位： | 1. 中国科学院 西安光学精密机械研究所, 瞬态光学与光子技术国家重点实验室, 西安 710119; 2. 中国科学院 研究生院, 北京 100049 |
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| 摘 要： | 将一种矩阵算法拓展应用于数值求解多模耦合模微分方程, 并使用该矩阵算法对大模场啁啾光纤光栅的光谱特性进行了理论研究。结果表明, 大模场多模光纤光栅因模式的自耦合和互耦合而使反射谱存在多个反射峰, 这与单模光纤光栅的反射谱不同。由于光栅周期存在啁啾, 大模场光纤光栅的反射峰分裂, 且峰值反射率减小。使用高斯切趾函数可使反射峰分裂在一定程度上得到改善。
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| 关 键 词： | 矩阵方法 大模场啁啾光纤光栅 耦合模理论 切趾函数 |
| 收稿时间： | 1900-01-01; |
Spectral characteristics of chirped fiber Bragg gratings in large-mode-area fibers |
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| Zhao Baoyin,Duan Kailiang,Zhao Wei.Spectral characteristics of chirped fiber Bragg gratings in large-mode-area fibers[J].High Power Laser and Particle Beams,2011,23(7). |
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| Authors: | Zhao Baoyin Duan Kailiang Zhao Wei |
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| Institution: | (1. State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China) |
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| Abstract: | A matrix method is extended to solve the multimode coupling differential equations,and thereby the spectral characteristics of the chirped Bragg gratings in large-mode-area fibers (LMA FBGs) are studied theoretically.Unlike those of Bragg gratings in single mode optical fibers (SM FBGs),the reflection spectra of chirped LMA FBGs contain self-coupling and co-coupling peaks of the existing modes.For the chirped LMA FBGa,the reflectivity decreases and the reflection peaks split.These splits can be improved on some degree by Gaussian apodization function. |
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| Keywords: | matrix method chirped LMA FBG coupled mode theory apodization function |
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