Highly efficient frequency tripling of laser radiation in a low-temperature laser-produced gaseous plasma
- 1 February 1991
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America B
- Vol. 8 (2) , 363-366
- https://doi.org/10.1364/josab.8.000363
Abstract
Relatively efficient (up to 3%) third-harmonic generation of picosecond Nd:YAG laser pulses for wavelength λ = 1.06 μm in a low-density laser plasma is reported for a coherent (i.e., collinear) geometry. The third-harmonic beam produced is nearly diffraction limited and coherent and can be used in other nonlinear-optical experiments. A simple theoretical model is proposed in order to explain this result. In the model, third-harmonic generation is considered to be a process that arises from the scattering of electrons by ions in the presence of the strong laser field.Keywords
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