| 高斯光束经局域相位调制后的光强分布和角谱特性 |
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| 引用本文： | 苏倩倩,张国文,陶华,蒲继雄.高斯光束经局域相位调制后的光强分布和角谱特性[J].中国激光,2011(10). |
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| 作者姓名： | 苏倩倩 张国文 陶华 蒲继雄 |
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| 作者单位： | 华侨大学信息科学与工程学院;中国科学院上海光学精密机械研究所高功率激光物理国家实验室; |
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| 基金项目： | 国家自然科学基金(60977068)资助课题 |
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| 摘 要： | 光学元件上不可避免地存在的缺陷会对传输光束产生局域振幅和相位调制。基于菲涅耳衍射积分,建立了高斯光束经局域相位调制后的传输模型,得到了高斯光束经有限多个小尺寸局域相位调制后的光强分布和角谱解析式,详细研究了相位调制尺寸与调制深度对光束光强分布和角谱的影响。结果表明,不同调制尺寸、调制深度对高斯光束在传输过程中的影响相似。且调制深度越大,产生的最大光强越大。相位缺陷尺寸越大产生的最大光强的位置离缺陷越远,随着调制深度、尺寸的增大和调制位置距光轴距离越近,低频区的角谱越小,中高频区的角谱越大。
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| 关 键 词： | 激光光学 相位调制 菲涅耳衍射积分 光强分布 角谱 |
Properties of the Intensity Distribution and the Angular Spectrum of a Gaussian Beam with Local Phase Modulation |
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| Su Qianqian Zhang Guowen Tao Hua Pu Jixiong.Properties of the Intensity Distribution and the Angular Spectrum of a Gaussian Beam with Local Phase Modulation[J].Chinese Journal of Lasers,2011(10). |
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| Authors: | Su Qianqian Zhang Guowen Tao Hua Pu Jixiong |
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| Affiliation: | Su Qianqian1 Zhang Guowen2 Tao Hua1 Pu Jixiong1 (1Department of Information Science & Engineering,Huaqiao University,Xiamen,Fujian 361021,China 2National Laboratory on High Power Laser and Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China) |
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| Abstract: | The unavoidable defects exists in the optical component will modulate the phase and the amplitude of the beam propagate in the system.Based on the Fresnel diffraction integral,the propagation mode of the Gaussian beam modulated by the local phase is built and the analytical expressions for the intensity distribution and angular spectrum of a Gaussian beam modulated by finite phase modulated defects has been derived.The impact of the modulation depth and the size of the defects on the intensity distribution ... |
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| Keywords: | laser optics phase modulation Fresnel diffraction intensity distribution angular spectrum |
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