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Focal switch of flattened Gaussian beams focused by a bifocal lens system

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The focal switch of flattened Gaussian beams (FGBs) passing through an unapertured bifocal lens system is studied. Detailed numerical results are given. It is found that for the unapertured case by an appropriate choice of the optical system and beam parameters, the focal switch can take place. The physical analysis of the focal switch in the bifocal lens system is made. The focal switch of Gaussian beams is regarded as a special case treated here.

Document Type: Research Article


Affiliations: 1: College of Electronic Engineering, Sichuan Normal University, Chengdu 610066, PR China 2: Institute of Laser Physics & Chemistry, Sichuan University, Chengdu 610064, PR China

Publication date: 2003-04-01

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