A Brewster-cut CsLiB><sub>6</sub> O><sub>10</sub> crystal is employed as an external resonant frequency doubler to generate cw deep-UV radiation at 266 nm. We have generated 5.0 W of usable cw output power, which is 6.1 W in the crystal, for an incident green power of 9.6 W, corresponding to an internal conversion efficiency of 61.8%. The power obtained is, to our knowledge, three times higher than previously reported for cw 266-nm generation.
© 2004 Optical Society of America
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3610) Lasers and laser optics : Lasers, ultraviolet
(160.4330) Materials : Nonlinear optical materials
(190.2620) Nonlinear optics : Harmonic generation and mixing
Jun Sakuma, Yuichi Asakawa, and Minoru Obara, "Generation of 5-W deep-UV continuous-wave radiation at 266nm by an external cavity with a CsLiB 6 O 10 crystal," Opt. Lett. 29, 92-94 (2004)