Analysis of Laser Diode Pumped Solid-State Laser Resonator by the Transform Circle Approach

The typical laser characteristics of a laser diode pumped,solid-state laser with a Z-type resonator structure are analyzed by the transform circle approach.Laser waists change with the thennal focus length of the lasing medium so that the output power becomes unstable.In particular,there is a very unstable operation region when the pump power is of medium magnitude.A method is put forward to avoid this situation.