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Multi-physical modeling of thermal and dispersive effects in optical systems for high power ultra-short laser pulses
Author(s): Tobias Bonhoff; Jochen Stollenwerk; Peter Loosen
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Paper Abstract

At high average power, ultra-short laser pulses (<1 ps) are not only affected by dispersive effects but also by thermallyinduced effects in the optical elements. In order to study those effects, we have developed a multi-physical simulation approach. It enables the analysis of the propagation of ultra-short pulses in the spatial and temporal regime against the background of the temperature-dependent refractive index profile, surface deformations, and dispersive effects. The simulation couples a thermo-mechanical finite element analysis and an optical analysis, using both ray-tracing and waveoptical methods. As case example, the influence of thermal and dispersive effects in a non-achromatic singlet lens and an achromatic doublet lens are analyzed and compared.

Paper Details

Date Published: 15 February 2018
PDF: 9 pages
Proc. SPIE 10525, High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VII, 1052504 (15 February 2018); doi: 10.1117/12.2288190
Show Author Affiliations
Tobias Bonhoff, RWTH Aachen Univ. (Germany)
Jochen Stollenwerk, RWTH Aachen Univ. (Germany)
Fraunhofer-Institut für Lasertechnik (Germany)
Peter Loosen, RWTH Aachen Univ. (Germany)
Fraunhofer-Institut für Lasertechnik (Germany)


Published in SPIE Proceedings Vol. 10525:
High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VII
Stefan Kaierle; Stefan W. Heinemann, Editor(s)

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