Highly efficient frequency tripling of laser radiation in a low-temperature laser-produced gaseous plasma
A. B. FedotovR. V. Khokhlov Nonlinear Optics Laboratory, Moscow State University, Moscow 119899, USSRS. M. GladkovR. V. Khokhlov Nonlinear Optics Laboratory, Moscow State University, Moscow 119899, USSRN. I. KoroteevR. V. Khokhlov Nonlinear Optics Laboratory, Moscow State University, Moscow 119899, USSRА. М. ЖелтиковR. V. Khokhlov Nonlinear Optics Laboratory, Moscow State University, Moscow 119899, USSR
1991en
ABI
Аннотация
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.
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