Abstract: It is reported about experimental establishment and theoretical interpretation of nontrivial effects of abnormally long change (≥10-100s!) of the low-stable 1-st and 2-nd kind self-modulation regimes by exclusively stable stationary regimes of uni- or bidirectional lasing with constant intensities and effects of very long (≥10s!) memory of this induced regimes after break of lasing with opaque screen in YAG:Nd3+ solid-state ring lasers (SRL) under modulation of laser perimeter at high-frequencies (:1MHz), which corresponds to return time of setting of the field in the laser resonator and at extremely small amplitude of perimeter modulation (:10-9 m!), which is much less the radiation wavelength (λ; 1,064∙10-6 m).
Key words: solid-state ring lasers with nonstationary resonators.