Multiwave quasi-phase-matched anti-Stokes stimulated Raman scattering

Abstract

In our method of anti-Stokes generation at stimulated Raman scattering (SRS) with quasi-phase-matched conditions we took into account the generation of high-order Stokes and anti-Stokes components. The dependence of Raman gain dispersion on SRS generation was studied using numerical simulation. The possibility of an effective periodical structure for hydrogen was determined. For a multiwave media model we found that the efficiency of first anti-Stokes generation reached ~40%. We determined that for transient SRS the maximum efficiency of quasi-phase-matching anti-Stokes generation does not depend on pulse duration while the medium length greatly increases as transience increases. Our calculations showed that for hydrogen and barium nitrate if the duration of interacted pulses is 3 ns and more then we can neglect the influence of transitivity on quasi-phase-matching conditions. The results of our research can be used for the creation of new effective nonlinear optical frequency converters and Raman amplifiers.