SPECTRAL CHANGES IN GAUSSIAN-CAVITY LASERS

Spectral changes occurring to laser radiation originated from amplifie d stimulated emission are evaluated as a function of the number of tra nsits performed inside a Gaussian optical cavity. It is shown that the spectral shifts on the optical asis are quite different from those al ready established for Gaussian Schell-model beams and that pulsed lase rs deliver pulses whose peak frequency slightly changes from the begin ning to the end of the pulse.