激光技术2009，Vol.33Issue(4)：437-439,448,4.DOI:10.3969/j.issn.1001-3806.2009.04.030
振幅调制高斯光束的聚焦特性及焦深
Focusing property and focal depth of amplitude-modulated Gaussian beam
摘要
Abstract
In order to study the focusing property and focal depth of amplitude-modulated Gaussian beam in different numerical-aperture (NA):they were numerically simulated according to the vector diffraction theory based on Debye approximate condition.Simulation results showed that the intensity in the focus plane was in a circular shape in a low NA optical system; while in a high NA optical system,it was in an elliptical shape because of the polarization effect.The focal spot size and focal depth can be adjusted by changing the geometric parameters and the amplitude modulation parameter exponential n of Gaussian beam.关键词
信息光学/振幅调制高斯光束/焦深/光强分布Key words
information optics/amplitude-modulated Gaussian beam/focal depth/intensity distribution分类
数理科学引用本文复制引用
杨蓉,李劲松..振幅调制高斯光束的聚焦特性及焦深[J].激光技术,2009,33(4):437-439,448,4.基金项目
国家自然科学基金资助项目(60708002) （60708002）
浙江省科技厅资助项目 (2007F70018) （2007F70018）
