It is demonstrated that with rigorous inclusion of diffraction on an intracavity hard aperture the values of the nonlinear differential loss coefficient Γ (which characterizes the efficiency of Kerr-lens mode locking) are several times higher than in the commonly used simplified approach in which diffraction effects are neglected. Diffraction changes modal properties and causes a faster decrease of mode losses with increasing power than predicted by the traditional approach. With this correction, the discrepancy between the Kerr-lens mode-locking theory and the theoretical estimates of the self-starting condition is substantially decreased.
© 1995 Optical Society of America
Original Manuscript: October 18, 1994
Published: February 1, 1995
Ondřej Haderka, "Influence of diffraction on hard-aperture Kerr-lens mode locking," Opt. Lett. 20, 240-242 (1995)