Ultrashort pulses are generated in a Ti:Al2O3 laser by using a coupled nonlinear external cavity. The external cavity uses self-phase modulation in an optical fiber to achieve passive mode locking without the need for synchronous pumping or acousto-optic modulation. A stable train of chirped 1.4-psec pulses is generated. After dispersive compensation, pulses as short as 200 fsec are obtained.
© 1989 Optical Society of America
Original Manuscript: June 2, 1989
Manuscript Accepted: August 2, 1989
Published: October 15, 1989
J. Goodberlet, P. A. Schulz, J. Wang, and J. G. Fujimoto, "Femtosecond passively mode-locked Ti:Al2O3 laser with a nonlinear external cavity," Opt. Lett. 14, 1125-1127 (1989)