Multimode solid-state laser with longitudinally nonuniform pump: TSD+approximation

Abstract

The influence of longitudinal pump nonuniformity on the behaviour of a multimode standing wave solid-state laser is studied. It is found that this nonuniformity leads to changes in both the optical spectrum and in the spectrum of relaxation oscillations in comparison with a uniformly pumped laser. Results obtained for two laser models, the global rate equation model and the TSD+ model as its simplified version, are compared. It allows us to verify the validity of the TSD+ model and define the scope of its application.