Abstract

In an actual laser, restriction of the oscillation on the lowest-order Gaussian mode necessitates to use of a suitable limiting aperture. In addition, the radial distribution of the saturated gain forms an extended amplitude-phase corrector, the optical power and the stopping down properties of which are proportional to the transverse inhomogeneity parameters. An allowance for the multiplicative effect of the active medium and of the aperture explains the asymmetric nature of the frequency shift and losses and hence also of the intensity relative to the central transition frequency. The sing of the asymmetry is determined by ratio of the inhomogeneity (linear and nonlinear) parameters to an aperture size.

© 2001 EPS