Computational model of dual Q-switching and lasing processes of the pulsed Cr4+: YAG laser pumped by a Nd-glass laser

摘要

A mathematical model describing the absorption and oscillation processes of an intracavity Cr4+:YAG crystal pumped by a Nd-glass laser has been developed, in order to describe the temporal behaviour of a laser-absorber system. The model assumes that the Cr4+ ions are excited to a higher level by excited state absorption, followed by relaxation directly to the upper laser level through a fast channel, and indirectly through a slow proposed intermediate channel at different lifetimes.