The mechanism of “flow”-type self-oscillations in a two-component active medium of a flow laser with an unstable resonator is studied. It is shown that this mechanism is associated with the excitation of edge self-oscillatory in-phase perturbations of the medium components. These flow perturbations with low damping reach the optical axis of the resonator and result in an instability.
42.60.Mi Dynamical laser instabilities; noisy laser behavior
$^1$Department of Optics and Spectroscopy, Faculty of Physics, Moscow State University, Moscow, 119992, Russia
$^2$Federal State Unitary Enterprise GNTs RFTRINITU, Troitsk, Moscow oblast, 142190, Russia