| 弯曲光纤布拉格光栅光谱特性的研究 |
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| 引用本文： | 杨利,邓虓.弯曲光纤布拉格光栅光谱特性的研究[J].中国激光,2008,35(s2):220-223. |
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| 作者姓名： | 杨利 邓虓 |
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| 作者单位： | 杨利:中国科学技术大学电子工程与信息科学系,安徽 合肥 230027
邓虓:中国科学技术大学电子工程与信息科学系,安徽 合肥 230027
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| 基金项目： | 中国科学院优秀博士后启动基金, 东南大学毫米波国家重点实验室开放课题(K200601)和安徽省光电子科学与技术重点实验室资助项目。 |
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| 摘 要： | 从理论与实验两方面研究了基于普通单模光纤的光纤布拉格光栅在弯曲时光谱特性的变化。基于耦合模理论, 以弯曲光纤为参考波导, 研究了弯曲波导的分析模型和漏模求解工具, 考虑了弯曲时光弹效应的影响, 得到弯曲光纤中的准导模（漏模）; 分析了弯曲情况下, 布拉格波长的变化情况, 与实验结果基本吻合。在1 cm的弯曲半径下, 布拉格波长向长波长的偏移在10-2nm量级。
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| 关 键 词： | 光纤光学 弯曲光纤光栅 漏模解模工具 耦合模理论 |
Study on Spectral Characteristics of Bend Fiber Bragg Grating |
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| Abstract: | The spectral characteristics of bend fiber Bragg gratings (FBGs) are theoretically and experimentally investigated. A bend fiber chosen as the reference waveguide in coupled mode analysis, the analysis model for bend waveguides and the mode solvers for leaky are studied, and the quasi guided mode (actually leaky modes) in the bend fibers are successfully solved. The influence of photoelastic effects is also taken into account during the mode searching. The variations of the spectral characteristics of bend FBG are analyzed by using coupled mode theory.The variation of Bragg wavelength is coincident with that obtained by experimental measurements . It is shown that red shift of Bragg wavelength is at the order of 10-2 nm for a common single mode fiber based bend FBG with bend radius of 1.0 cm. |
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| Keywords: | fiber optics bend fiber Bragg grating mode solver for leaky modes coupled mode theory |
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