COMPARATIVE-STUDY OF THE FORSTER-DEXTER MODEL FOR STUDYING NONRADIATIVE ENERGY-TRANSFER IN LASER MATERIALS WITH MONTE-CARLO BASED NUMERICALSIMULATIONS

We present a comparative analysis of the Monte Carlo (MC) and Forster and Dexter (FD) models when used to determine the interionic interacti on that drives the non radiative energy transfer processes in solid st ate laser materials. The fundamentals of both models are discussed. Th e inadequacies of the FD model to explain the energy transfer process from Nd3+ to Er3+ in Nd(1%), Er(15%), Cr(1%):YAG are shown. It is show n that the MC model takes into account the discreteness of the crystal lattice and predicts a four-fold mixture of interactions, exchange an d multipolar, to drive the energy transfer process.