Nonlinear phase shift and frequency jumps in second-harmonic generation ina dual-cavity laser

Frequency characteristics and the stability of lasing regimes are considere d for a solid-state laser with intracavity second-harmonic generation and f eedback at the frequency of the second harmonic. Three stationary states di ffering from each other by a nonlinear phase shift related to second-harmon ic generation are investigated. It is shown that jumps in the frequency of laser radiation may be induced by transitions between the considered statio nary states as parameters of a dual-cavity laser are smoothly tuned.