A new resonator design for doubly resonant continuous-wave intracavity sum-frequency mixing is presented. We generated 212 mW of coherent radiation at 618 nm by mixing the radiation of a 1080-nm Nd<sup>3+</sup>:YAlO<sub>3</sub> laser and a 1444-nm Nd<sup>3+</sup>:YAG laser. Two different mixing resonator setups and several nonlinear-optical crystals were investigated. So far output is limited by unequal performance of the two fundamental lasers and coating problems of the nonlinear crystals.
© 1997 Optical Society of America
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3530) Lasers and laser optics : Lasers, neodymium
(140.3580) Lasers and laser optics : Lasers, solid-state
(190.2620) Nonlinear optics : Harmonic generation and mixing
(230.5750) Optical devices : Resonators
Hanno M. Kretschmann, Frank Heine, Günter Huber, and Thórsteinn Halldórsson, "All-solid-state continuous-wave doubly resonant all-intracavity sum-frequency mixer," Opt. Lett. 22, 1461-1463 (1997)