Influence of the radiationless energy transfer on optical switching in an anisotropic dye laser with saturable absorber

摘要

Abstract: In this work an analysis of the nonlinear dynamics of an anisotropic dye laser with a saturable absorber has been carried out. Radiationless energy transfer in the absorber was taken into account. It has been shown that a specific type of auto-oscillation appears because of the interaction of the polarization modes caused by the radiationless energy transfer and by the anisotropy in the active medium induced by linearly polarized light pulse. This oscillation is characterized by a half-period shift of the radiation-density maxima of one polarization mode relative to the maxima of the other and is called an anti-symmetric oscillation. It has been noted that in the limit of the high energy migration rate these anti-symmetric oscillations disappear and the anisotropic laser with saturable absorber looks like an isotropic one. !11