Journal of the Optical Society of America B: Optical Physics
Electrooptics, Laser beams -- Stability, Gaussian beams, Lasers
Under some conditions, spontaneous coherent pulsations are known to occur in the output beams of inhomogeneously broadened laser oscillators. These lasers typically operate with a Gaussian transverse field distribution, while the corresponding theoretical models assume a uniform-plane-wave field. The effects of a Gaussian field on the stability criteria of single-mode inhomogeneously broadened ring laser oscillators are considered in this study. It is found that in comparison to a plane wave a Gaussian field variation still permits low-threshold spontaneous pulsations but reduces the parameter space over which these pulsations can be observed.
Pitak Chenkosol and Lee W. Casperson, "Effects of Gaussian fields on the stability of inhomogeneously broadened lasers," J. Opt. Soc. Am. B 26, 1837-1844 (2009).