Abstract
We present results of experiments on generation of optical harmonics and sum-frequency radiation in a low-temperature laser-produced plasma. A plasma of optical breakdown is shown to be a prospective nonlinear medium for producing coherent short-wavelength radiation via harmonic generation and frequency mixing. We discuss experimental data on generation of third, fifth, seventh, and ninth harmonics of Nd:YAG-laser radiation, as well as processes of nonlinear frequency mixing.
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