The Development of Semiconductor Saturable Absorption Mirror as Passive Qswitching Absorber

Some types of novel absorbers for solidstate laser passive Qswitching developed in recent years are introduced, such as Cr4+ doped series,Cr,Nd∶YAG selfQswitching laser crystal,absorbers for passive Qswitching eyesafe lasers, GaAs absorber, semiconductor saturable absorption mirror.The principle, application and exploratory development of semiconductor saturable absorption mirrors for passive Qswitching of solidstate lasers and fiber lasers are emphasized.