We propose and theoretically investigate a novel operating regime of femtosecond Kerr-lens mode-locked solid-state lasers that avoids group-velocity dispersion compensation by use of a nonresonant semiconductor plate in the focused resonator section that provides an overall negative nonlinear refractive index per round trip. The saturable loss of the laser resonator with an effective self-defocusing nonlinearity is derived from a generalized ABCD matrix formalism, and the correspondingly calculated steady-state pulse parameters show that a Kerr-lens mode-locked laser with an overall negative nonlinear refractive index generates stable femtosecond pulses without any dispersion compensation.
© 1996 Optical Society of America
Original Manuscript: April 29, 1996
Published: October 1, 1996
S. Gatz, J. Herrmann, and M. Müller, "Kerr-lens mode locking without dispersion compensation," Opt. Lett. 21, 1573-1575 (1996)