A dispersively compensated scheme for sum-frequency mixing of broadband ultrashort laser pulses is reported. An increase of the bandwidth of the sum-frequency mixing process by 12 times compared with the noncompensated bandwidth of the given crystal has been demonstrated. Mixing radiation at 266 and 707 nm in a 1-mm-thick beta-barium metaborate crystal by using the compensated scheme results in an output bandwidth of 0.6 nm at 193 nm, which corresponds to a minimum output pulse duration of 90 fs.
© 1992 Optical Society of America
Original Manuscript: August 10, 1992
Published: December 1, 1992
Th. Hofmann, G. Szabó, K. Mossavi, and F. K. Tittel, "Spectrally compensated sum-frequency mixing scheme for generation of broadband radiation at 193 nm," Opt. Lett. 17, 1691-1693 (1992)