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Proceedings Paper

Efficient high-power-diode-pumped thin-disk Yb:YAG-laser
Author(s): Andreas Voss; Uwe Brauch; Klaus Wittig; Adolf Giesen
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Paper Abstract

Our new, scalable disk laser concept allows efficient diode-pumped high-power operation of quasi-three-level lasers with high beam quality. The use of a very thin crystal disk with one face mounted on a heat sink together with the low heat generation of Yb:YAG (< 11%) enables high pump power densities (> 5 kW/cm2) required for efficient operation without strong thermal degradation or optical distortion. Compact diode-pumped solid-state lasers in the kilowatt range seem to be achievable by increasing the pump beam diameter and/or by using several crystal disks. We present our latest results, obtained with a (phi) 2 mm X 0.4 mm Yb:YAG crystal operated at temperatures between 200 K and 300 K with an output power of up to 13.5 W and more than 50% optical-to-optical efficiency at 9.5 W. Simulations of thermal deformation and stress as well as of efficiency are also presented. Additionally, recent measurements of the tuning range of the diode-pumped Yb:YAG-laser, indicting the potential of femtosecond pulse generation, are shown.

Paper Details

Date Published: 6 June 1995
PDF: 8 pages
Proc. SPIE 2426, 9th Meeting on Optical Engineering in Israel, (6 June 1995); doi: 10.1117/12.211231
Show Author Affiliations
Andreas Voss, Univ. Stuttgart (Germany)
Uwe Brauch, DLR (Germany)
Klaus Wittig, Univ. Stuttgart (Germany)
Adolf Giesen, Univ. Stuttgart (Germany)

Published in SPIE Proceedings Vol. 2426:
9th Meeting on Optical Engineering in Israel
Itzhak Shladov; Yitzhak Wiessman; Natan Kopeika, Editor(s)

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