Continuous-wave (cw) upconversion laser emission of Pr, Yb:LiYF4 (Pr, Yb:YLF) at room temperature is reported for the first time. Pumping with a Ti:sapphire laser, output powers of 75 mW and 19 mW were achieved on the transitions 3P03F2L=639.5 nm) and 3P03F4L=720 nm), respectively.

© 1996 Optical Society of America

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