摘要
研究了余弦高斯光束通过无光阑透镜后的焦开关现象。推导出了轴上最大光强位置满足的一元三次方程和相对跃迁量公式,并做了大量的数值计算。研究表明,当光束参数β>1时,聚焦余弦高斯光束会有焦开关现象出现。
The focal switch of cosine-Gaussian beams focused by a thin lens without aperture is studied in detail. The thirdorder equation governing the position of axial maximum intensity and the formula of the relative transition height is derived. A large number of numerical calculation results are presented. It is shown that the focal switch of focused cosine-Gaussian beams can take place as the beam parameterβ is larger than 1.
出处
《激光技术》
CAS
CSCD
北大核心
2005年第6期654-656,共3页
Laser Technology
基金
四川省教育厅自然科学基金资助项目(2002A089)
关键词
焦开关
余弦高斯光束
光束参数β
无光阑透镜
focal switch
cosine-Gaussian beams
beam parameterβ
thin lens without aperture
