RATE-EQUATIONS FOR MODELING OF SHORT-PULSE RARE-GAS HALIDE EXCIMER LASERS

In this work, on the basis of the analysis of data relating to relaxat ion processes and emission spectra of excimer molecules, the rate equa tions for modelling short-pulse rare-gas halide excimer lasers are for mulated and discussed. The equations take into account relaxation proc esses important for short-pulse generation, such as decay of B-, C- an d X-states, vibrational relaxation in these states, and B-C mixing. As a special case for these equations, simplified equations for KrF and XeCl lasers are introduced. The gain recovery curves and the dependenc es of saturation energy on pulse duration, computed both for KrF and X eCI, coincide well with the experimental data. Discussion of the facto rs influencing the gain dynamics and the saturation energy of these me dia, is also presented.