| 矢量非傍轴平顶高斯光束的光强研究 |
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| 引用本文： | 康小平. 矢量非傍轴平顶高斯光束的光强研究[J]. 琼州学院学报, 2008, 0(2): 12-14 |
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| 作者姓名： | 康小平 |
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| 作者单位： | 琼州学院物理系,海南五指山572200 |
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| 基金项目： | 国家教育部重点资助项目（208110）,海南省教育厅高校科研资助项目（Hj200780）. |
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| 摘 要： | 从矢量Rayleigh-Sommerfeld衍射积分公式出发,以矢量非傍轴平顶高斯光束为例,对其横向光强分布进行了研究．研究结果表明,非傍轴矢量光束的两种光强表示式,即传统光强公式和时间平均坡印廷矢量的Z分量,它们之间的相对误差与束腰宽度和波长之比wO／λ有关．
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| 关 键 词： | 激光光学 矢量非傍轴平顶高斯光束 传统光强表示式 时间平均坡印廷矢量的z分量 相对误差 |
Study of Intensity of Vectorial Nonparaxial Flattened Gaussian Beams |
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| Affiliation: | KANG Xiao - ping (Department of Physics, Qiongzhou University, Wuzhishan Hainan 572200,China) |
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| Abstract: | Starting from the vectorial Rayleigh - Sommerfeld diffraction integrals and taking the vectorial nonparaxial flattened Gaussian beams as an example, the transversal intensity of vectorial nonparaxial flattened Gaussian beams is studied. Numerical calculation results show the two expressions for the intensity of nonparaxial vectorial beams, i. e. , the convential intensity expression and the z component of the time - averaged Poynting vector, their relative error depends on the the waist - width to wavelength ratio w0/. |
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| Keywords: | Laser optics vectorial nonparaxial flattened Gaussian beams conventional intensity expression zcomponent of the time - averaged poynting vector relative error |
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