Numerical simulation of stimulated-Raman-scattering conversion of femtosecond UV pulsesстатья

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Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.

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[1] Numerical simulation of stimulated-raman-scattering conversion of femtosecond uv pulses / M. S. Dzhidzhoev, P. M. Mikheev, V. T. Platonenko, A. B. Savelev // KVANTOVAYA ELEKTRONIKA. — 1997. — Vol. 24, no. 3. — P. 255–259. A numerical simulation is reported of transient parallel stimulated Raman scattering (SRS) of femtosecond pulses in dispersive molecular gases. The one-dimensional two-wave approximation is used and the self-interaction as well as the cross-interaction of the pulses are taken into account. The kinetics of formation of a Stokes pulse and the transformation of the spectrum and temporal profile in the course of amplification to saturation are tackled for the first time. It is shown that a fundamental role is played by the influence of the difference between the group velocities, which governs the rate of passage of a Stokes pulse along the pump pulse, on the SRS conversion parameters. Depending on this velocity difference, which is a characteristic of the active medium and proportional to its pressure, the SRS falls into three regimes: (1) a Stokes pulse repeats the profile of a pump pulse; (2) pulse compression with optimal gain and strong peaking of the leading edge; (3) multi-spiking oscillation.

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