SPECIAL SECTION ON LASER BEAM SHAPING

Geometric optics-based design of laser beam shapers

[+] Author Affiliations
David L. Shealy

University of Alabama at Birmingham, Department of Physics, 1530 Third Avenue South, CH310, Birmingham, Alabama 35294-1170 E-mail: dls@uab.edu

Shao-Hua Chao

Hualien Teachers College, Sciences Building 123 Hua-Hsi, Room 202, Hua Lien, Taiwan 970

Opt. Eng. 42(11), 3123-3138 (Nov 01, 2003). doi:10.1117/1.1617311
History: Received Jun. 27, 2003; Revised Jul. 29, 2003; Accepted Jul. 29, 2003; Online October 31, 2003
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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. © 2003 Society of Photo-Optical Instrumentation Engineers.

© 2003 Society of Photo-Optical Instrumentation Engineers

Citation

David L. Shealy and Shao-Hua Chao
"Geometric optics-based design of laser beam shapers", Opt. Eng. 42(11), 3123-3138 (Nov 01, 2003). ; http://dx.doi.org/10.1117/1.1617311


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