Investigations of the theoretical and experimental features of the passive Q-switching operation of CO2 lasers containing intracavity saturable absorbers are reported. The pulse shapes observed in experiments with SF6, CF3Br, and CH3I gases are presented as a function of the laser-control parameters across the phase diagram. Through a numerical analysis based on a four-level model, the laser-operation regions and the pulse shapes were investigated for absorption of these gases. The main experimental features are reproduced by the theory, but a quantitative agreement could not be reached.
© 1985 Optical Society of America
E. Arimondo, P. Bootz, P. Glorieux, and E. Menchi, "Pulse shape and phase diagram in the passive Q switching of CO2 lasers," J. Opt. Soc. Am. B 2, 193-201 (1985)