Spatial coherence of XeCl lasers

Abstract

As it is known, excimer lasers have a short time of inversion (order of 10 ns) and high gain because that stimulated emission occurs only at time of several passes on cavity. Let us consider the following model of energetic parameters and spatial coherence forming in flat mirrors cavity. Let us suppose that in initial moment of time the spontaneous emission near output mirror has intensity: where A is amplitude of spontaneous emission on cavity axis, a is the radius of laser cavity aperture, x is transverse coordinate.