Powerful green upconversion lasing of Er<sup>3+</sup>:LiLuF<sub>4</sub> was achieved with a multipass pumping setup. The maximum output was 213 mW for Ti:sapphire laser pumping. Diode-pumped cw lasing at room temperature is demonstrated for the first time to the authors' knowledge.
© 2002 Optical Society of America
E. Heumann, S. Bär, H. Kretschmann, and G. Huber, "Diode-pumped continuous-wave green upconversion lasing of Er3+:LiLuF4 using multipass pumping," Opt. Lett. 27, 1699-1701 (2002)