THE EFFECTS OF SENSITIZATION ON THE ACTIVATOR EMISSION IN LASER CRYSTALS

The complex effects of the sensitisation of laser crystals on the spec tral and temporal behaviour of the activator emission is discussed. It is thus shown that the mutual crystal-field perturbations produced by the sensitizer S and activator A ions transforms the systems formed b y these ions into inhomogeneous systems composed of homogeneous subsys tems, which are further individualised by specific manifestation of th e S-A energy transfer processes. A suitable rate equation modelling fo r each of the S-A subsystems which takes into account the energy trans fer between the subsystems enables a correct description of the emissi on properties in various laser crystals under selective or non-selecti ve pump.