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Proceedings Paper

Development of edge pumped Yb:YAG planar waveguide lasers
Author(s): H. J. Baker; J. F. Monjardin; I. Thomson; N. Trela; J. D. R. Valera; D. R. Hall
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Paper Abstract

A waveguide with 150 μm core height of 2% Yb:YAG between sapphire claddings is core-pumped at 480W by diode bars coupled into the 13 mm long edge-facet. The pump unit has custom correction of collimation errors and lens aberrations. Using a 6mm width and 7° edge-facet angle, power is limited by competing ASE loss or parasitic oscillation along TIR-trapped internal paths, giving 40 W output for stable and 25 W for unstable resonators. Ray-tracing shows a 20° facet angle is necessary to successfully out-couple ASE from the core. Preliminary operation at 90W and an increased threshold for the parasitic oscillation are obtained.

Paper Details

Date Published: 14 February 2008
PDF: 8 pages
Proc. SPIE 6871, Solid State Lasers XVII: Technology and Devices, 68710Q (14 February 2008); doi: 10.1117/12.774124
Show Author Affiliations
H. J. Baker, Heriot-Watt Univ. (United Kingdom)
J. F. Monjardin, Heriot-Watt Univ. (United Kingdom)
I. Thomson, Heriot-Watt Univ. (United Kingdom)
N. Trela, Heriot-Watt Univ. (United Kingdom)
J. D. R. Valera, Heriot-Watt Univ. (United Kingdom)
D. R. Hall, Heriot-Watt Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 6871:
Solid State Lasers XVII: Technology and Devices
W. Andrew Clarkson; Norman Hodgson; Ramesh K. Shori, Editor(s)

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