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Characterization of beam quality of 10-kW class laser
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Paper Abstract

The laboratory model of 10-kW class laser effector was designed and assembled. The special laboratory setup for characterization of its parameters and research on interaction with materials was developed. As a result of dynamic thermaloptic phenomena inside laser source and measurement setup the observed laser beam distributions in far field present features of 4D spatial-temporal, non-stationary stochastic process, thus averaging in given plane over long exposures times was not justified. Measurement of laser beam parameters directly in far field and Wavefront Sensing Measurement by Shack-Hartmann method were applied in experiment. To analyze the experimental data of distorted wavefront measurements Wigner Transform method was applied. Beam quality and brightness determined via Wigner approach was changed in the same way as the direct measurements of beam parameters in far field. The deterministic aberration as a result of dynamic thermal-optic effects depending on averaged laser power was found, which can explain non-Gaussian profiles in the vicinity of focal plane.

Paper Details

Date Published: 7 October 2019
PDF: 7 pages
Proc. SPIE 11162, High Power Lasers: Technology and Systems, Platforms, Effects III, 1116209 (7 October 2019); doi: 10.1117/12.2532893
Show Author Affiliations
Przemysław Gontar, Wojskowa Akademia Techniczna im. Jaroslawa Dabrowskiego (Poland)
Łukasz Gorajek, Wojskowa Akademia Techniczna im. Jaroslawa Dabrowskiego (Poland)
Krzysztof Kopczyński, Wojskowa Akademia Techniczna im. Jaroslawa Dabrowskiego (Poland)
Jan K. Jabczyński, Wojskowa Akademia Techniczna im. Jaroslawa Dabrowskiego (Poland)


Published in SPIE Proceedings Vol. 11162:
High Power Lasers: Technology and Systems, Platforms, Effects III
Harro Ackermann; Willy L. Bohn; David H. Titterton, Editor(s)

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