| Sinc切趾反射体布拉格光栅衍射特性分析 |
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| 引用本文： | 沈本剑,郑光威,谭吉春,何焰蓝.Sinc切趾反射体布拉格光栅衍射特性分析[J].中国激光,2011(9). |
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| 作者姓名： | 沈本剑 郑光威 谭吉春 何焰蓝 |
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| 作者单位： | 国防科学技术大学理学院;国防科学技术大学光电科学与工程学院; |
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| 基金项目： | 国家自然科学基金委员会与中国工程物理研究院联合基金NSAF(10676038)资助课题 |
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| 摘 要： | 基于sinc切趾反射体布拉格光栅的谱合成技术是获得高功率谱合成输出的有效方法。考虑到入射单色平面波光束的偏振状态,采用传输矩阵法,分析了光栅参数对衍射效率、波长选择性和角度选择性的影响。计算结果表明,入射角度对不同偏振状态入射光束的衍射效率影响较大。sinc切趾反射体布拉格光栅的衍射效率近似由光栅厚度和折射率调制幅值的乘积决定,当折射率调制幅值与光栅厚度的乘积大于1.7028×10-6时,不同偏振态在小角度入射时的衍射效率高于99%。sinc切趾反射体布拉格光栅的波长选择性带宽和角度选择性带宽随折射率调制幅值的增加而增大,随衍射效率的增加而减小。通过优化光栅参数,利用sinc切趾体布拉格光栅可实现光谱间距低于200 pm的多光束谱合成。
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| 关 键 词： | 光栅 谱合成 sinc切趾 反射体布拉格光栅 传输矩阵法 |
Diffraction Characteristic Analysis of Sinc-Apodized Reflective Volume Bragg Grating |
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| Shen Benjian Zheng Guangwei Tan Jichun He YanlanCollege of Science,National University of Defense Technology,Changsha,Hunan ,ChinaCollege of Optoelectronic Science , Engineering,China.Diffraction Characteristic Analysis of Sinc-Apodized Reflective Volume Bragg Grating[J].Chinese Journal of Lasers,2011(9). |
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| Authors: | Shen Benjian Zheng Guangwei Tan Jichun He YanlanCollege of Science National University of Defense Technology Changsha Hunan ChinaCollege of Optoelectronic Science Engineering China |
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| Affiliation: | Shen Benjian1 Zheng Guangwei2 Tan Jichun1 He Yanlan11College of Science,National University of Defense Technology,Changsha,Hunan 410073,China2College of Optoelectronic Science and Engineering,China |
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| Abstract: | It is an effective approach to obtain high power laser output by spectral beam combining technology based on the sinc-apodized reflective volume Bragg grating.Considering the polarization of the monochromatic plane wave incident beam,the effects of the grating parameters on the diffraction efficiency,spectral selectivity and angular selectivity of the grating are analyzed by using the chain matrix method.The results show that the incident angle affects the diffraction efficiency greatly when the incident be... |
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| Keywords: | grating spectral beam combining sinc-apodization reflective volume Bragg grating chain matrix method |
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