A diode-pumped chirped-pulse regenerative amplifier with a cooled Yb:YLF crystal has been developed. The output pulse energy is 30 mJ at 20-Hz repetition rate. A high effective extraction efficiency of 68% is obtained, which is attributed to reduced saturation fluence at low temperature and to a high effective pulse energy fluence during regenerative amplification. After pulse compression by use of a parallel grating pair, 18-mJ pulse energy and 795-fs pulse duration are obtained.
© 2003 Optical Society of America
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers
(140.7090) Lasers and laser optics : Ultrafast lasers
Junji Kawanaka, Koichi Yamakawa, Hajime Nishioka, and Ken-ichi Ueda, "30-mJ, diode-pumped, chirped-pulse Yb:YLF regenerative amplifier," Opt. Lett. 28, 2121-2123 (2003)