Generation of femtosecond pulses from a continuous-wave mode-locked chromium-doped forsterite (Cr4+:Mg2SiO4) laser is reported. The forsterite laser was actively mode locked by using an acousto-optic modulator operating at 78 MHz with two Brewster high-dispersion glass prisms for intracavity chirp compensation. Transform-limited sub-100-fs pulses were routinely generated in the TEM00 mode with 85 mW of continuous power (with 1% output coupler), tunable over 1230–1280 nm. The shortest pulses measured had a 60-fs pulse width.
© 1992 Optical Society of America
Original Manuscript: April 2, 1992
Published: July 1, 1992
A. Seas, V. Petričević, and R. R. Alfano, "Generation of sub-100-fs pulses from a cw mode-locked chromium-doped forsterite laser," Opt. Lett. 17, 937-939 (1992)