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14 February 2008 Development of edge pumped Yb:YAG planar waveguide lasers
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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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
H. J. Baker, J. F. Monjardin, I. Thomson, N. Trela, J. D. R. Valera, and D. R. Hall "Development of edge pumped Yb:YAG planar waveguide lasers", Proc. SPIE 6871, Solid State Lasers XVII: Technology and Devices, 68710Q (14 February 2008);

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