Two Yb<sup>3+</sup> -doped KY(WO<sub>4</sub>)<sub>2</sub> regenerative amplifiers, one end pumped by two 1.6-W single-stripe diodes at 940 nm and the other side pumped by one 20-W diode bar at 980 nm, are demonstrated. When the regenerative amplifiers are injected, 40-μJ , 400-fs and 65-μJ , 460-fs pulses at a 1-kHz repetition rate are obtained following compression from the end- and side-pumped amplifiers, respectively.
© 2002 Optical Society of America
(140.3280) Lasers and laser optics : Laser amplifiers
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers
(320.7090) Ultrafast optics : Ultrafast lasers
Hsiao-hua Liu, John Nees, and Gérard Mourou, "Directly diode-pumped Yb:KY(WO4)2 regenerative amplifiers," Opt. Lett. 27, 722-724 (2002)