Abstract. Optical systems of resonators of solid-state lasers affording compensation of deviations of actual parameters of the active element thermal lens from their calculated values and fluctuations of the parameters are considered. A method of overall calculation of the scheme of resonator optical system is presented. Formulas for calculating the intracavity lenses displacement to compensate the deviation of actual parameters of the thermal lens from the calculated ones (or fluctuations of the parameters) are derived. The results of calculations presented in the paper confirm the feasibility of practical implementation of the method of compensation for thermo-optical distortions of parameters of active elements of solid-state lasers on a standard element base. 

Keywords: solid-state laser, resonator, stable resonator, active element, thermal lens, Gaussian beam

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