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Proceedings Paper

Beam quality, thermal lensing, and thermal aberration measurements in diode-pumped lasers
Author(s): Jan Karol Jabczynski; Krzysztof Kopczynski; Artur Szczesniak
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Paper Abstract

Thermal guiding effect plays a dominant role in beam formation of diode end-pumped lasers. Thermally induced aberrations occur for high pump density resulting in beam quality degradation. Thermal distortions in such lasers were investigated in this paper both theoretically and experimentally. It was found that severe wavefront distortions are generated outside the pump volume whereas for beam confined to pump volume the aberration effects are negligible. For high pump density these distortions results in atypical caustics shape. This effect was examined in two cases: fundamental mode laser pumped by 2-W cw diode and multimode laser pumped by 10-W fiber coupled bar. Two crystals: Nd:YAG and Nd:YVO4 were used as active media. Caustics shape and beam quality measurements, as well as an interferometric inspection of wavefront distortion were performed. Satisfactory agreement between theory and experiments was achieved.

Paper Details

Date Published: 19 August 1996
PDF: 9 pages
Proc. SPIE 2775, Specification, Production, and Testing of Optical Components and Systems, (19 August 1996); doi: 10.1117/12.246767
Show Author Affiliations
Jan Karol Jabczynski, Military Univ. of Technology (Poland)
Krzysztof Kopczynski, Military Univ. of Technology (Poland)
Artur Szczesniak, Military Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 2775:
Specification, Production, and Testing of Optical Components and Systems
Anthony E. Gee; Jean-Francois Houee, Editor(s)

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