J. Mackenzie, S. Mitchell, R. Beach, C. Li, H. Meissner, D. Shepherd
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15 W diode-pumped Tm:YAG double-clad waveguide laser
Summary form only given. We present results for a planar direct-bonded double-clad waveguide comprised of a Tm:YAG core, undoped YAG inner-cladding, and sapphire outer-cladding layers. The YAG/sapphire numerical aperture is sufficient to capture most of the highly divergent radiation of a laser diode, thus allowing a side-pumped arrangement with two proximity-coupled /spl lambda//sub p/=785 nm, 20 W diode bars. This simple and efficient pumping scheme, combined with the thin waveguide dimension, leads to a high pumping intensity, as required for efficient operation of quasi-three-level laser systems.
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