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余弦高斯光束在单轴晶体中垂直于光轴的传输

, PP. 893-901

Keywords: 晶体光学,偏振特性,傍轴矢量传输理论,余弦高斯光束,垂直光轴,各向异性

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Abstract:

基于光束在各向异性单轴介质中的傍轴矢量传输理论,推导出余弦高斯光束在各向异性单轴晶体中垂直于光轴传输的解析公式,利用数值模拟计算方法,研究各向异性介质对余弦高斯光束偏振特性的影响.研究表明,由于晶体的各向异性,使得光束沿x方向偏振的场分布衍生出y分量.将余弦高斯光束在单轴晶体中垂直于光轴传输的特性与沿光轴传输的特性作了比较,二者位形基本相似,原来的偏振特性都不再保持.此外,余弦高斯光束在单轴晶体中垂直于光轴的传输,选择适当的参数后可在特定截面上获得类高斯\,空心\,近平顶等的场强分布.

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