Reflection limitation by driven stimulated Brillouin rescattering and finite-bandwidth spectral interaction

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Abstract
Driven stimulated Brillouin rescattering, obtained by a multiline laser light, each satellite line downshifted by twice the acoustic frequency, is an efficient way to reduce stimulated Brillouin reflection [C. Montes, Phys. Rev. Lett. 50, 1129 (1983)]. An explicit reflection formula for two input lines depleting in a finite, homogeneous plasma slab—in the heavy ion-damping limit—is obtained which generalizes Tang’s formula for one single input line. Finite spectral interaction of narrow input lines with broad backscattered spectra are considered by solving numerically the nonlinear integro-differential ion-Compton equations. The results are compared to those obtained by a single wide-bandwidth input spectrum.