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Proceedings Paper

Yb:YAG disk laser pumped by a stacked diode array
Author(s): Nicolas Kugler; Thomas Brand; I. Schmidt; Chunyu Gao; Horst Weber
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Paper Abstract

A major problem using laser diodes for longitudinal pumping of solid state lasers is the poor beam quality and the non symmetric beam profile of the diodes as the astigmatic beam emitted from the array of diodes exhibits a limited focusability in the direction of the slow axis of the diodes. To overcome this problem an optic which turns the astigmatic beam of a stacked diode array into a radially symmetric (stigmatic) beam has been designed. This symmetric beam is then focused into an axially water cooled disk laser to serve as a longitudinal pump source. Up to now different laser crystals have been investigated as laser source. Using Yb:YAG an output power of 60 W in qcw operation has been realized whereas Nd:YVO4 delivers a qcw power of 113 W. The optical to optical efficiencies are 18% and 32.3% respectively.

Paper Details

Date Published: 29 December 1998
PDF: 11 pages
Proc. SPIE 3682, Laser Optics '98: Solid State Lasers, (29 December 1998); doi: 10.1117/12.334794
Show Author Affiliations
Nicolas Kugler, Laser- und Medizin-Technologie gGmbH (Germany)
Thomas Brand, Laser- und Medizin-Technologie gGmbH (Germany)
I. Schmidt, Laser- und Medizin-Technologie gGmbH (Germany)
Chunyu Gao, Technische Univ. Berlin (United States)
Horst Weber, Technische Univ. Berlin (Germany)

Published in SPIE Proceedings Vol. 3682:
Laser Optics '98: Solid State Lasers
Vladimir I. Ustugov, Editor(s)

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