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Optical Engineering

Geometric optics-based design of laser beam shapers
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Paper Abstract

When diffraction effects are not important, geometrical optics (ray tracing, conservation of energy within a bundle of rays, and the constant optical path length condition) can be used to design laser beam shapers by solving beam shaping equations or by optimizing a beam shaping merit function for the configurations, including aspheric elements or spherical-surface gradient-index lenses, which are required to change the input irradiance and phase profile into a more useful form. Geometrical optics-based methods are presented for shaping both rotationally and rectangular symmetric laser beam profiles. Solutions of the beam shaping equations are presented for a two-plano-aspheric lens system for shaping a circular symmetric Gaussian beam into a top-hat output beam profile and a two-mirror system with no central obscuration for shaping an elliptical Gaussian input beam into a Fermi-Dirac output beam profile.

Paper Details

Date Published: 1 November 2003
PDF: 16 pages
Opt. Eng. 42(11) doi: 10.1117/1.1617311
Published in: Optical Engineering Volume 42, Issue 11
Show Author Affiliations
David L. Shealy, Univ. of Alabama/Birmingham (United States)
Shao-Hua Chao, Hualien Teachers College (Taiwan)

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