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Proceedings Paper

Thermo-Optical (TOP) analysis of transmissive elements for laser systems
Author(s): Alexander Gatej; Annika Richmann; Oliver Pütsch; Peter Loosen
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Paper Abstract

Increasing laser beam qualities make thermal lensing again a hot topic and demand for a thermo-optical simulation for improving classical ray tracing and enabling optimization possibilities for thermally aberrated optical systems. This paper summarizes the approach for coupling FEM and ray tracing using a weighted least squares approximation algorithm and demonstrates the abilities of the coupled simulation in the case of a CO2 laser system for polishing of glass and plastics. It can be demonstrated that the algorithm can be used for the analysis of higher order aberrations, since the application contains a Gaussian to top-hat conversion lens group which suffers from thermal gradients. Finally, the benefits and further developments of analyzing thermal gradients in optical simulation are being discussed.

Paper Details

Date Published: 17 October 2012
PDF: 10 pages
Proc. SPIE 8490, Laser Beam Shaping XIII, 84900C (17 October 2012); doi: 10.1117/12.929213
Show Author Affiliations
Alexander Gatej, RWTH Aachen (Germany)
Annika Richmann, RWTH Aachen (Germany)
Oliver Pütsch, RWTH Aachen (Germany)
Peter Loosen, RWTH Aachen (Germany)
Fraunhofer-Institut für Lasertechnik (Germany)

Published in SPIE Proceedings Vol. 8490:
Laser Beam Shaping XIII
Andrew Forbes; Todd E. Lizotte, Editor(s)

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