A 100-kHz mode-locked Ti:sapphire-seeded regenerative amplifier pumpin
g an optical parametric amplifier generates femtosecond pulses tunable
from 470 to 710 nm. This output was compressed with a pair of prisms
to bandwidth-limited pulses of 80- to 40-fs duration and more than 150
nJ of energy. These tunable pulses were then bandwidth expanded throu
gh, self-phase modulation in bulk material and further compressed to l
ess than 30-fs duration.