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Proceedings Paper

Flat hat glass diffractive optical beam shaper
Author(s): Steffen Reichel; Uwe Petzold; Ralf Biertuempfel; Helge Vogt
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Paper Abstract

Many laser applications need a homogeneous - so called flat hat - light distribution in the application area. However, many laser emit Gaussian shaped light. The technology of diffractive optical elements (DOE) can be used to shape the Gaussian beam into a flat hat beam at a compact length. SCHOTT presents a DOE design of a flat hat DOE beam shaper made out of optical glass. Here the material glass has the significant advantage of high laser durability, low scattering losses, high resistance to temperature, moisture, and chemicals compared to polymer DOEs. Simulations and measurements on different DOEs for different wavelength, laser beam width, and laser divergence are presented. Surprisingly the flat hat DOE beam shaper depends only weakly on wavelength and beam width but strongly on laser divergence. Based on the good agreement between simulation and measurement an improved flat hat DOE beam shaper is also presented.

Paper Details

Date Published: 19 February 2009
PDF: 10 pages
Proc. SPIE 7194, Laser Resonators and Beam Control XI, 719403 (19 February 2009); doi: 10.1117/12.807932
Show Author Affiliations
Steffen Reichel, SCHOTT AG (Germany)
Uwe Petzold, SCHOTT AG (Germany)
Technical Univ. of Darmstadt (Germany)
Ralf Biertuempfel, SCHOTT AG (Germany)
Helge Vogt, SCHOTT AG (Germany)

Published in SPIE Proceedings Vol. 7194:
Laser Resonators and Beam Control XI
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko; Lutz Aschke, Editor(s)

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