Direct focusing modifications of elliptical gaussian beam by non-circular apertures |
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| Authors: | Sheng-Hsiung Chan Shin-Gwo Shiue Mao-Hong Lu |
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| Affiliation: | Institute of Electro-Optical Engineering, National Chiao Tung University , 1001 Ta Hsueh Road, Hsinchu, 30050, Taiwan |
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| Abstract: | Abstract 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. |
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