@article {Wang:75,
	title = {Generation of dual-wavelength, synchronized, tunable, high-energy, femtosecond laser pulses with nearly perfect Gaussian spatial profile},
	journal = {Opt. Commun.},
	volume = {91},
	year = {1992},
	pages = {77{\textendash}81},
	abstract = {We use self-phase modulation in a single-mode fiber to produce broadband femtosecond laser pulses. Subsequent amplification through two Bethune cells yields high-energy, tunable, pulses synchronized with the output of an amplified colliding-pulse-modelocked (CPM) laser. We routinely obtain tunable 200-J pulses of 42-fs (FWHM) duration with a nearly perfect Gaussian spatial profile. Although self-phase modulation in a single-mode fiber is widely used in femtosecond laser systems, amplification of a figer-generated supercontinuum in a Bethune cell amplifier is a new feature which maintains the high-quality spatial profile while providing high gain. This laser system is particularly well suited for high energy dual-wavelength pump-probe experiments and time-resolved four-wave mixing spectroscopy.},
	doi = {10.1063/1.468112},
	url = {/files/mazur/files/rep_75.pdf},
	author = {J. Kai Wang and Y. Siegal and Lu, C. and Mazur, E.}
}
