Features of ultrashort pulse generation in a ring mode-locked YAG : CR4+-+ laser

We simulate femtosecond pulse formation in the laser cavity taking into account the material dispersion, frequency self-modulation on the Kerr-type nonlinearity, loss modulation in the system, including a Kerr lens and an aperture. Kerr-lens mode locking is achieved in a ring bidirectional YAG:Cr4+ laser with broadband amplification line. We determine the optimum dispersion value for pulse duration minimization and study the problem of application of the ring Kerr-lens mode-locked laser for rotation sensing.