New periodic and chaotic regimes in a solid-state ring laser with an optical phase nonreciprocity

Dynamics of a solid-state ring laser with periodic pump modulation was investigated experimentally in the presence of a phase nonreciprocity of its cavity. New lasing regimes were discovered: periodic antiphase pulsed modulation of counterpropagating waves and synchronisation of chaotic intensities of counterpropagating waves, differing from the perfect synchronisation investigated earlier because the difference between the intensities of chaotic pulses travelling in opposite directions was a periodic function of time. The phase nonreciprocity reduced the range of existence of dynamic chaos in a ring solid-state laser.