| 低散斑环形光束整形器件的设计及实验 |
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| 引用本文： | 刘文静,庞辉,曹阿秀,史立芳,付永启,邓启凌.低散斑环形光束整形器件的设计及实验[J].光子学报,2020,49(2):93-101. |
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| 作者姓名： | 刘文静 庞辉 曹阿秀 史立芳 付永启 邓启凌 |
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| 作者单位： | 电子科技大学 物理学院,成都 611731;中国科学院光电技术研究所,成都 610209;中国科学院大学,北京 100049,中国科学院光电技术研究所,成都,610209,电子科技大学 物理学院,成都,611731 |
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| 基金项目： | 中国科学院青年创新促进会,中科院西部之光人才支撑计划;中科院科研仪器设备研制项目;国家自然科学基金;国家重点研发计划;四川省科技计划项目 |
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| 摘 要： | 提出一种可有效抑制散斑噪声的衍射元件设计方法.在传统Gerchberg-Saxton算法的基础上,通过选择一种特殊的初始相位,在不降低衍射效率的同时,有效提升光斑的均匀性.以将高斯光束整形成环形平顶光束为例,开展了数值仿真和光学实验.结果表明,利用该方法和传统Gerchberg-Saxton算法设计得到的环形平顶光束散斑对比度分别为11%和34%,验证了该方法可以获得低散斑噪声的环形平顶光束.
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| 关 键 词： | 衍射光学元件 光束整形 Gerchberg-Saxton算法 空间光调制器 散斑抑制 |
Design and Experiments of Annular Beam Shaping Device with Low Speckle Noise |
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| LIU Wen-jing,PANG Hui,CAO A-xiu,SHI Li-fang,FU Yong-qi,DENG Qi-ling.Design and Experiments of Annular Beam Shaping Device with Low Speckle Noise[J].Acta Photonica Sinica,2020,49(2):93-101. |
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| Authors: | LIU Wen-jing PANG Hui CAO A-xiu SHI Li-fang FU Yong-qi DENG Qi-ling |
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| Institution: | (College of Physics,University of Electronic Science and Technology,Chengdu 611731,China;Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | A design method of diffractive element that can effectively suppress speckle noise is proposed.Based on the traditional Gerchberg-Saxton algorithm,the uniformity of the light spot is effectively improved without reducing the diffraction efficiency by selecting a special initial phase.Taking the Gaussian beam shaped into an annular flat-top beam as an example,numerical simulation and optical experiments are carried out.The results show that the speckle contrasts of the annular flat-top beams obtained by using the proposed method and the traditional Gerchberg-Saxton algorithm are 11% and 34%,respectively,which verifies the proposed method can obtain a annular flat-top beam with low speckle noise. |
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| Keywords: | Diffractive optical element Beam shaping Gerchberg-Saxton algorithm Spatial light modulator Speckle suppression |
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