Abstract
We demonstrate the generation of sub-6-fs pulses centered at 405 nm by frequency doubling of 8.6-fs Ti:sapphire laser pulses. The frequency doubling is carried out in a nonlinearly chirped quasi-phase-matching grating fabricated in a lithium tantalate substrate. This device simultaneously provides frequency conversion and pulse compression of the positively prechirped fundamental pulses. The second-harmonic pulses are characterized in a cross-correlation setup, and their pulse shapes are retrieved by two iterative phase-reconstruction algorithms. The generated second-harmonic spectrum spans a bandwidth of 220 THz. To our knowledge, these are the shortest pulses ever generated in the blue spectral region.
© 2001 Optical Society of America
Full Article | PDF ArticleMore Like This
G. Imeshev, M. M. Fejer, A. Galvanauskas, and D. Harter
Opt. Lett. 26(5) 268-270 (2001)
G. Imeshev, A. Galvanauskas, D. Harter, M. A. Arbore, M. Proctor, and M. M. Fejer
Opt. Lett. 23(11) 864-866 (1998)
A. M. Schober, G. Imeshev, and M. M. Fejer
Opt. Lett. 27(13) 1129-1131 (2002)