Development of edge pumped Yb:YAG planar waveguide lasers

H. J. Baker; J. F. Monjardin; I. Thomson; N. Trela; J. D. R. Valera; D. R. Hall

doi:10.1117/12.774124

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14 February 2008 Development of edge pumped Yb:YAG planar waveguide lasers

H. J. Baker, J. F. Monjardin, I. Thomson, N. Trela, J. D. R. Valera, D. R. Hall

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Proceedings Volume 6871, Solid State Lasers XVII: Technology and Devices; 68710Q (2008) https://doi.org/10.1117/12.774124
Event: Lasers and Applications in Science and Engineering, 2008, San Jose, California, United States

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.

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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); https://doi.org/10.1117/12.774124

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