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Thulium Channel Waveguide Laser with 69.7% efficiency

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Abstract

Laser experiments on thulium-gadolinium-lutetium-yttrium-co-doped, buried, ridge-type channel waveguides in a monoclinic potassium double tungstate demonstrate a maximum slope efficiency of 69.7% and output powers up to ~300 mW at ~1.9 µm.

© 2012 Optical Society of America

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