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w0/λ有关.
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/.
出处
《琼州学院学报》
2008年第2期12-14,共3页
Journal of Qiongzhou University
基金
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)
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
Laser optics
vectorial nonparaxial flattened Gaussian beams
conventional intensity expression
zcomponent of the time - averaged poynting vector
relative error
