Abstract

A short discussion of the properties of far-infrared (FIR) lasers shows that these are suitable systems to observe instabilities and chaos. Experiments on 15NH3 FIR waveguide lasers show a single-mode self-pulsing instability and period doubling. A CH2F2 Fabry–Perot resonator laser shows the same single-mode self-pulsing, period-doubling, and chaotic emission. The experiments are done at relatively high pressure, at which inhomogeneous broadening can occur only through the ac-Stark effect. Qualitatively, the observations agree with theoretical model calculations.

© 1985 Optical Society of America

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