High-efficiency generation of high-order harmonics in intense laser fields with coherent Raman self-scattering

I. P. Prokopovich; A. A. Khrutchinsky

doi:10.1117/12.239740

6 May 1996 High-efficiency generation of high-order harmonics in intense laser fields with coherent Raman self-scattering

I. P. Prokopovich, A. A. Khrutchinsky

Author Affiliations +

Proceedings Volume 2796, ICONO '95: Fundamentals of Laser-Matter Interaction; (1996) https://doi.org/10.1117/12.239740
Event: International Conference on Coherent and Nonlinear Optics, 1995, St. Petersburg, Russian Federation

Abstract

The dynamics of high-intense laser fields at coherent Raman self-scattering are investigated by the use of numerical simulation. The processes under investigation take place at the Raman scattering on electronic states in atoms with transition to be forbidden in electro-dipole approximation, on vibrational or rotational states in molecules, on states connected with the spin flip and other. It is found that the threshold intensities exist provided that the pulse duration is smaller than dephasing time of the Raman transition in the medium. Under this, the following processes occur: an effective generation of the high-order harmonics comes up; the plateau forms in the harmonic spectrum. The maximum which arises on this plateau shifts to the higher-harmonic numbers in case of the higher threshold intensities of the pulse. It is shown how the transformation of the initial pulse intensity into high-order harmonics intensity can be considerably increased with the different initial parameters of the pulse and the medium.

Citation Download Citation

I. P. Prokopovich and A. A. Khrutchinsky "High-efficiency generation of high-order harmonics in intense laser fields with coherent Raman self-scattering", Proc. SPIE 2796, ICONO '95: Fundamentals of Laser-Matter Interaction, (6 May 1996); https://doi.org/10.1117/12.239740

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