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The first channel waveguide laser in Nd:YAG showing a threshold reduction of 20 times compared to a planar waveguide is described. With diode pumping this ion-implanted waveguide laser has been operated with absorbed power thresholds as low as approximately 500 mu W in good agreement with theoretical expectation. Output slope efficiencies of approximately 29% have also been demonstrated.
Date of Publication: 5 Dec. 1991