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Proceedings Paper

Diode radial pumped composite microchip Yb:YAG laser: output performances and thermal effects
Author(s): Traian Dascalu; Nicolaie A. Pavel; Takunori Taira
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Paper Abstract

A diode radial pumped microchip Yb:YAG laser that consists of a Yb-doped core surrounded by undoped YAG of slab shape is presented. Quasi-continuous wave pumping of an 800-μm thick 10-at.% Yb doped core of 2 x 2 mm2 square shape with pulses of 5-Hz repetition rate and 2.5% duty cycle delivers 66-W output peak power at 220-W input pump power with 49% slope efficiency. 112-W peak power with 63% slope efficiency and 38% optical-to-optical efficiency, were obtained from a of 1.2 x 1.2 mm2 square 15-at.% Yb:YAG core of 800-μm thickness. Continuous-wave operation with up to 90 W were obtained from a 400-μm thick Yb:YAG/YAG structure with a 10-at.% Yb:YAG square core of 2x2-mm2 area; the slope efficiency and optical-to-optical efficiency with respect to the pump power were 40% and 28%, respectively. Measurements of the optical phase distortions induced by pumping gives focus shift bellow 0.05 m and shows the absence of astigmatic effects, indicating the axial heat flow in this pumping configuration.

Paper Details

Date Published: 21 October 2004
PDF: 7 pages
Proc. SPIE 5581, ROMOPTO 2003: Seventh Conference on Optics, (21 October 2004); doi: 10.1117/12.582785
Show Author Affiliations
Traian Dascalu, Institute for Molecular Science (Japan)
Institute of Atomic Physics (Romania)
CREATE - Japan Science and Technology Corp. (Japan)
Nicolaie A. Pavel, Institute for Molecular Science (Japan)
Institute of Atomic Physics (Romania)
Takunori Taira, Institute for Molecular Science (Japan)

Published in SPIE Proceedings Vol. 5581:
ROMOPTO 2003: Seventh Conference on Optics
Valentin I. Vlad, Editor(s)

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