Abstract
Continuous-wave (CW) simultaneous laser emission on the 0.9-µm 4 F 3/2 → 4 I 9/2 transition and the 4 F 3/2 → 4 I 11/2 transition at 1.06 µm is obtained in Nd-based laser crystals of thin-disk geometry and using a multi-pass pumping scheme. A Nd:Y3Al5O12 (Nd:YAG) thin disk emitted simultaneous laser radiation at 946 and 1064 nm with 5.1 W output power, and Nd:YVO4 and Nd:GdVO4 thin-disk lasers with more than 3 W output power at 0.91 and 1.06 µm were realized. The ratio between the output power at one of the wavelengths and the total output power could be varied by the laser resonator design. An intracavity frequency-doubled Nd:YVO4 thin-disk laser with alternate green at 532 nm and “deep-blue” at 457 nm generation of high average output powers is demonstrated.
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