Annotation
It has been established both experimentally and theoretically that in YAG:Nd$^{3+}$ solid-state ring lasers (SRLs) with strong competition and nonlinear coupling of counter-running waves (CRW) there exists, due to CRW self-diffraction on induced inverted-population gratings, an unusual (for laser physics) effect of ultralow-frequency instability in both uni- and bidirectional lasing when the radiation-direction commutation frequency is lower than the lowest-frequency SRL parameter, the rate of inverted-population relaxation $1/T_1$, by a factor of $10^5$ or more (commutation period Tc longer than $T_k>10^2$ s).
© 2016 Publisher M.V.Lomonosov Moscow State University
Authors
A.N. Shelaev
Research Institute of Nuclear Physics, Department of Solid-State Physics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
Research Institute of Nuclear Physics, Department of Solid-State Physics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia