7 May 1996 Investigation of computer-generated diffractive beam shapers for the task of Gauss-to-ring laser beam transformation
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Abstract
To solve a special task of laser-beam material treatment, a new diffractive element was designed, fabricated and investigated, which converts a given single-mode CO2-laser beam into a ring-shaped intensity distribution in the working plane. This was accomplished by application of refined ray-tracing methods and an enhanced micro technology using e-beam generated masks. Relevant steps of calculation and manufacturing of these masks are outlined. First results of measured intensity distribution demonstrate a good conformity with results of computer simulations.
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Michael Rudolf Duparre, Barbara Luedge, Richard M. Kowarschik, Michael A. Golub, Ernst-Bernhard Kley, Hans-Joerg Fuchs, "Investigation of computer-generated diffractive beam shapers for the task of Gauss-to-ring laser beam transformation", Proc. SPIE 2689, Diffractive and Holographic Optics Technology III, (7 May 1996); doi: 10.1117/12.239615; https://doi.org/10.1117/12.239615
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