Chirped-pulse amplification in the ultraviolet region is demonstrated by use of a broadband Ce<sup>3+</sup>: LiCaAlF<sub>6</sub> laser medium. A modified bow-tie-style four-pass amplifier pumped by 100-mJ, 266-nm pulses from a <i>Q</i> -switched Nd:YAG laser has a gain factor of 370 and delivers 6-mJ, 290-nm pulses. After dispersion compensation, the output pulses can be compressed to 115 fs.
© 2001 Optical Society of America
Zhenlin Liu, Toshimasa Kozeki, Yuji Suzuki, Nobuhiko Sarukura, Kiyoshi Shimamura, Tsuguo Fukuda, Masahiro Hirano, and Hideo Hosono, "Chirped-pulse amplification of ultraviolet femtosecond pulses by use of Ce3+:LiCaAlF6 as a broadband, solid-state gain medium," Opt. Lett. 26, 301-303 (2001)