DYNAMICS OF LASERS WITH PASSIVE AND ACTIVE MODULATION OF LOSSES

Lasers with active and passive modulation of losses are widely used as sources of high power pulses of light. There is a lot of experimental publications on the passive mode-locking in solid state and dye lasers with a saturable absorber (LSA)and on passive modulation of losses in CO2 LSA. Various regular and chaotic pulsations have been observed and theoretical models for their interpretation have been proposed and explain many features of experiment [1–15]. For CO2 lasers with active modulation of losses (LAML) experimental results with different successions of high power pulses have found good confirmation in theoretical description [16–25]. For a ring He-Ne laser theoretical verification of some original experiments has been got [26–29]. Below brief review of the last results for some models of such lasers is proposed.