Laser performance of disordered Yb:Ca3(NbGa)2-xGa3O12crystal under diode pumping at 974-976 nm

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Efficient continuous-wave (CW) laser operation is demonstrated at room temperature with disordered Yb:Ca 3 (NbGa) 2-x Ga 3 O 12 crystal by diode pumping at 974 – 976 nm. With 2.0 W of pump power absorbed in a 1.5 mm thick crystal, a CW output power of 0.62 W is generated, resulting in an optical-to-optical efficiency of 31%, while the slope efficiency amounts to 50%. Upon increasing the pump power to a high level, a transient process takes place, in which the output power decreases continuously towards its stationary value.