A. A. Afonenko and I. S. Manak^*

We investigated the possibility of describing the processes of radiation generation at two spectrally spaced wavelengths in quantum-dimensional lasers based on asymmetric heterostructures by means of rate equations that take account of the effects of nonlinear amplification. We show that agreement between experimental and theoretical results is achieved in the case where it is assumed that the processes of interaction between spectrally spaced modes prevail over the processes of self-stress of the modes. An analysis of various mechanisms of nonlinear amplification is carried out, and it is found that dynamic heating of charge carriers by radiation is a reason for nonlinear phenomena with the features indicated.