Stability investigations of laser with saturable absorber

Stability of steady solutions of semiclassical laser-absorber model is investigated. It is found that the solutions exhibit instabilities for all values of cavity losses and, for some values of parameters, additional instability, connected with phase, appears. It is also shown by a numerical calculation that in an unstable region periodic and erratic motion can exist above criticallity.Supported in part by the Polish Ministery of Science, Technology and Higher Education, Project M.R.I.7