Peculiarities of the optimisation of optical resonators with regular small-scale inhomogeneities of an active medium

The peculiarities of parametric optimisation of resonators containing small-scale inhomogeneities are considered. The two most important practical cases are studied in detail: an unstable resonator with small-scale phase inhomogeneities in the active medium and a stable resonator with small-scale amplitude modulations caused by the use of a perforated output mirror.