Eur. Phys. J. Appl. Phys. 33, 183-188 (2006)
https://doi.org/10.1051/epjap:2006014

Optimization of an optical system used for laser beam transformation

¹ Institute of Applied Laser, Kunming University of Science and Technology, 68 Wenchang Road, 121 Street, Kunming 650093, Yunnan, P.R. China
² CETHIL UMR 5008 INSA de Lyon, Bât. S. Carnot, 20 avenue Albert Einstein, 69621 Villeurbanne Cedex, France

Corresponding authors: licg66@yahoo.com.cn delmas@genser.insa-lyon.fr

Received: 15 January 2005
Revised: 29 October 2005
Accepted: 4 November 2005
Published online: 22 February 2006

Abstract

The principle of a specific optical device which was designed to homogenize the power density distribution of a CO₂ laser beam is described in the paper. The detailed formulas to express the relation between power density distribution of converted beam and optical parameters of device are given. Based on this relation, a scheme to optimize the device is presented. The power density distributions simulated by computer before and after optimization are given. A tentative criterion to estimate the uniformity of a beam spot in which there are interference fringes, is put forward.