We describe a Kerr-lens mode-locked Cr:forsterite femtosecond laser in whic
h two Gires-Tournois interferometer mirrors are used to provide negative in
tracavity group-delay dispersion. The mode-locked laser produced near-bandw
idth-limited pulses of 71 fs with an average output power of 700 mW at a wa
velength of 1259 nm. (C) 2000 Optical Society of America [S0740-3224(00)025
04-2] OCIS codes: 140.4050, 140.7090, 230.4040, 230.4170, 320.5540, 320.716
0.