Ter-Gabrielyan N, Fromzel V, Mu X, Meissner H, Dubinskii M. Resonantly pumped single-mode channel waveguide Er:YAG laser with nearly quantum defect limited efficiency.
Opt Lett 2013;
38:2431-2433. [PMID:
23939071 DOI:
10.1364/ol.38.002431]
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Abstract
We demonstrated the continuous-wave operation of a resonantly pumped Er:YAG single-mode channel waveguide laser with diffraction-limited output and nearly quantum defect limited efficiency. Using a longitudinally core-pumped, nearly square (61.2 μm×61.6 μm) Er3+:YAG waveguide embedded in an undoped YAG cladding, an output power of 9.1 W with a slope efficiency of 92.8% (versus absorbed pump power) has been obtained. To the best of our knowledge, this optical-to-optical efficiency is the highest ever demonstrated for a channel waveguide laser.
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