Abstract

A CO2 laser with a gaseous saturable absorber shows a variety of periodic self-pulsation [passive Q switching (PQS)], depending on the lasing conditions and the characteristics of the absorbing molecules. We present a novel rate-equation model that comprehensively describes the transient pulse structures of PQS in the CO2 laser system. The numerical calculation based on the present model predicts that a chaotic PQS pulsation also is realized in a limited parameter region.

© 1988 Optical Society of America

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