Direct observation of the saturation of stimulated Brillouin scattering by ion-trapping-induced frequency shifts.
作者信息
Froula D H, Divol L, Offenberger A A, Meezan N, Ao T, Gregori G, Niemann C, Price D, Smith C A, Glenzer S H
机构信息
L-399, Lawrence Livermore National Laboratory, University of California, P.O. Box 808, Livermore, California 94551, USA.
出版信息
Phys Rev Lett. 2004 Jul 16;93(3):035001. doi: 10.1103/PhysRevLett.93.035001. Epub 2004 Jul 13.
We report the first measurement of the saturation of stimulated Brillouin scattering (SBS) by an ion-trapping-induced frequency shift, which was achieved by directly measuring the amplitude and absolute frequency of SBS-driven ion-acoustic waves (IAW). A frequency shift of up to 30% and a simultaneous saturation of driven IAW and SBS reflectivity were observed. The scaling of the frequency shift with the IAW amplitude compares well with theoretical calculations. We have further measured fast 30 ps oscillations of the SBS-driven IAW amplitude induced by the frequency shift.
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