We demonstrate what is to our knowledge the first passively mode-locked thin-disk Yb:KY(WO<sub>4</sub>)<sub>2</sub> laser. The laser produces pulses of 240-fs duration with an average power of 22 W at a center wavelength of 1028 nm. At a pulse repetition rate of 25 MHz, the pulse energy is 0.9µJ , and the peak power is as high as 3.3 MW. The beam quality is very close to the diffraction limit, with <i>M</i><sup>2</sup>=1.1 .
© 2002 Optical Society of America
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.4050) Lasers and laser optics : Mode-locked lasers
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers
F. Brunner, T. Südmeyer, E. Innerhofer, F. Morier-Genoud, R. Paschotta, V. E. Kisel, V. G. Shcherbitsky, N. V. Kuleshov, J. Gao, K. Contag, A. Giesen, and U. Keller, "240-fs pulses with 22-W average power from a mode-locked thin-disk Yb:KY(WO4)2 laser," Opt. Lett. 27, 1162-1164 (2002)