Abstract
The first holmium fluoride waveguide laser, to the best of our knowledge, is reported using a 25-μm-thick -ion-modified 4.5 at. % , 0.5 at. % -codoped active layer grown by liquid phase epitaxy on (001)-oriented substrate. Pumped by a Ti:sapphire laser at 797.2 nm, the planar waveguide laser generates 81 mW of continuous-wave (CW) output at with a slope efficiency of 24%. Power scaling up to 186 mW at 2051 nm and 2065 nm in quasi-CW regime is demonstrated. The parameters of the energy transfer are determined. epitaxies are promising for waveguide lasers and amplifiers at above 2 μm.
© 2018 Optical Society of America
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