Abstract

Saturable absorber initial transmission effect on the Characteristics of passively Q-switching Er +3doped fiber laser was studied. Cr+4:YAG used as a saturable absorber in the study. Software computer program buildup in this study for numerical solving of rate equations model by Rung - Kutta –Fehlberg method. The results show the increasing of initial transmission of saturable absorber lead to decreasing of energy and increasing of pulse duration pulse. In final the pulse power decreasing with the increasing of SA initial transmission

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