摘要
A self-excitation double pathway relaxation oscillation mechanism to deal with the seif-pulsing output of up conversion laser with rare-earth ions as the active material is raised.The reabsorption of the laser signal,which causes self-excitation of system and two-pathway transition of systepi,plays a role of adjusting Q,and causes the oscillation output of laser.A qualitative analysis to the appearance of self-pulsing output of rare-earth-doped laser is given.
