Direct focusing modifications of elliptical Gaussian beam by non-circular apertures

Sheng-Hsiung Chan, Shin-Gwo Shiue, Mao-Hong Lu
1998 Journal of Modern Optics  
For focusing the elliptical Gaussian beam directly, the effects of a non-circular aperture on the focusing properties are studied. The focusing properties for different shapes of apertures, which include a circle, an ellipse and a rectangle, are calculated and compared. Moreover, for different elliptical Gaussian beams, an empirical aperture selection rule that can be used to circularize the focusing spot is proposed. The energy transmission ratios are also considered in this paper.
doi:10.1080/095003498150439 fatcat:fp5rtj4dczb2zb4gq7lkqgw5gu