Self-focusing in conjunction with an intracavity aperture creates a power-dependent amplitude modulation in laser oscillators, which allows passive mode locking. A simple analytical formalism yields closed-form expressions for the depth of passive amplitude modulation introduced by either the spatial gain profile or a hard aperture inserted in the resonator. Design issues for this mode-locking technique are discussed.
© 1992 Optical Society of America
Original Manuscript: May 28, 1992
Published: September 15, 1992
T. Brabec, Ch. Spielmann, P. F. Curley, and F. Krausz, "Kerr lens mode locking," Opt. Lett. 17, 1292-1294 (1992)