Abstract
We report on measurements of periodic and chaotic self-pulsing beyond the second threshold of far-infrared NH3 lasers. While the instabilities of the 81 μm14NH3 laser follow a simple pattern, for the 374 μm15NH3 laser different pulsing properties are found in different parameter ranges.
Pulses under conditions of high pumping power are measured in detail, in view of possible applications of these coherent, high-repetition rate far-infrared pulsed lasers.
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