We demonstrated an intrinsic conversion efficiency of 56% from the input fundamental power to the generated second-harmonic power. The second-harmonic power of 581 mW was obtained from the external cavity with a LiB<sub>3</sub>O<sub>5</sub> crystal through the frequency doubling of a 1.17-W Ti:sapphire laser at 746 nm, when the finesse of the robust external cavity was 260.
© 2003 Optical Society of America
Hiroshi Kumagai, Yuichi Asakawa, Tetsuaki Iwane, Katsumi Midorikawa, and Minoru Obara, "Efficient Frequency Doubling of 1-W Continuous-Wave Ti:Sapphire Laser with a Robust High-Finesse External Cavity," Appl. Opt. 42, 1036-1039 (2003)