| 大角带宽高衍射效率体全息光栅的设计和制备 |
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| 引用本文： | 鲁婷婷,冯奇斌,王梓,吕国强.大角带宽高衍射效率体全息光栅的设计和制备[J].光学学报,2021(2):21-27. |
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| 作者姓名： | 鲁婷婷 冯奇斌 王梓 吕国强 |
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| 作者单位： | 合肥工业大学电子科学与应用物理学院;合肥工业大学特种显示技术国家工程实验室;合肥工业大学仪器科学与光电工程学院 |
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| 基金项目： | 安徽省科技重大专项(18030901002)。 |
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| 摘 要： | 高性能体全息光栅是全息波导的重要耦合元件,角带宽小、平均衍射效率不高是制约体全息光栅性能的重要因素。以不对称倾斜记录为出发点,设计并制备了大角带宽高衍射效率的体全息光栅。首先讨论在横电模式光和横磁模式光下体全息光栅的记录参数与其衍射效率的关系,找到平均衍射效率较高的记录参数范围,随后进一步分析在此范围内的记录参数与体全息光栅的角带宽的关系,从而确定获得大角带宽高衍射效率体全息光栅的最佳记录参数。实验结果表明:在参考光入射角度为25°、信号光入射角度为30°时,制备的体全息光栅的角带宽达到±14°,衍射效率为82%。
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| 关 键 词： | 衍射 体全息光栅 衍射效率 角带宽 记录角度 |
Design and Fabrication of Volume Holographic Gratings with Large Angular Bandwidth and High Diffraction Efficiency |
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| Institution: | (School of Electronic Science&Applied Physics,Hefei University of Technology,Hefei,Anhui 230009,China;National Engineering Laborutory of Special Display Technology,National Key Laboratory of Advanced Display Technology,Academy of Photoelectric Technology,Hefei University of Technology,Hefei,Anhui 230009,China;School of Inustrumentation and Opto-Electronics Engineering,Hefei University of Technology,Hefei,Anhui 230009,China) |
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| Abstract: | High-performance volume holographic gratings are important coupling elements for holographic waveguides,and small angular bandwidth and low average diffraction efficiency are major factors restricting the performance of volume holographic gratings.In this paper,a volume holographic grating with large angular bandwidth and high diffraction efficiency is designed and prepared based on asymmetrical tilt recording.First,we discuss the relationship between the recording parameters and the diffraction efficiency of the volume holographic grating under transverse electric mode light and transverse magnetic mode light to find the range of recording parameters at high average diffraction efficiency.Then,the relationship between the recording parameters in this range and the angular bandwidth of the volume holographic grating is further analyzed,thereby determining the best recording parameters to obtain a volume holographic grating with large angular bandwidth and high diffraction efficiency.The experimental results show that when the incident angle of the reference light is 25°and the incident angle of the signal light is 30°,the angular bandwidth of the prepared volume holographic grating reaches±14°and the diffraction efficiency is 82%. |
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| Keywords: | diffraction volume holographic grating diffraction efficiency angular bandwidth recording angle |
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