Focal switch in unapertured converging Hermite-cosh-Gaussian beams


Autoria(s): Zeng YS; 彭润伍; 范滇元
Data(s)

2006

Resumo

Based on the Huygens-Fresnel diffraction integral, analytical representation of unapertured converging Hermite-cosh-Gaussian beams is derived. Focal switch of Hermite-cosh-Gaussian beams is studied detailedly with numerical calculation examples and a physical interpretation of focal switch is presented. It is found that decentered parameter is the dominant factor for the emergence of focal switch, and Fresnel number affects the amplitude of focal switch and the value of critical decentered parameter to determine emergence of focal switch. Physically, the emergence of focal switch of Hermite-cosh-Gaussian beams is resulted from competition between two major maximum intensities and switch of the absolute maximum intensity from a point to another when decentered parameter increases. (C) 2005 Elsevier Ltd. All rights reserved.

Identificador

http://ir.siom.ac.cn/handle/181231/2934

http://www.irgrid.ac.cn/handle/1471x/10810

Idioma(s)

英语

Fonte

Zeng YS;彭润伍;范滇元.,Opt. Laser Technol.,2006,38(8):620-625

Palavras-Chave #focal switch #Hermite-cosh-Gaussian beams #decentered parameter
Tipo

期刊论文