摘要
文章阐述高斯波束基本理论,分析比较高斯波束的主要描述方法,基于角谱展开法推导电磁场的表达式,研究过波束轴线的切面上波束宽度内场强及相位分布,发现高斯波束场能量主要分布在轴线附近,远离轴线时呈指数衰减。
The basic theory of gaussian beam was presented in this paper,and the main methods for describing the gaussian beam field was analysised and compared. The expression of electromagnetic field was deduced based on the method of angular spec trum expansion,and the inner field strength and phase distribution in the beamwidth section of the beam axis were studied. It found that the energy of gaussian beam is mainly distributed around the axis, and decreasing by exponential attenuation with the increasing distance from the axis.
出处
《衡阳师范学院学报》
2013年第3期31-36,共6页
Journal of Hengyang Normal University
基金
湖南省普通高校光电课程组教学团队
湖南省普通高校光学省级精品课程(2006-84)
湖南省重点学科建设项目(070207)
湖南省自然科学基金项目(11JJ6063)
关键词
高斯波束
傍轴近似
微扰法
角谱展开
场强和相位分布
gaussian beam
paraxial approximation
perturbation method
angular spectrum
field intensity and phase distribution
