Modeling of the competition of stimulated Raman and Brillouin scatter in multiple beam experiments

Multiple laser beam experiments with plastic target foils at the Laboratoire pour L’Utilisation des Lasers Intenses (LULI) facility [Baldis et al., Phys. Rev. Lett. 77, 2957 (1996)] demonstrated anticorrelation of stimulated Brillouin and Raman backscatter (SBS and SRS). Detailed Thomson scattering diagnostics showed that SBS always precedes SRS, that secondary electron plasma waves sometimes accompanied SRS appropriate to the Langmuir Decay Instability (LDI), and that, with multiple interaction laser beams, the SBS direct backscatter signal in the primary laser beam was reduced while the SRS backscatter signal was enhanced and occurred earlier in time. Analysis and numerical calculations are presented here that evaluate the influences on the competition of SBS and SRS, of local pump depletion in laser hot spots due to SBS, of mode coupling of SBS and LDI ion waves, and of optical mixing of secondary and primary laser beams. These influences can be significant. The calculations take into account simple mo...

[1]  J. Heikkinen,et al.  Ion acoustic nonlinearities in stimulated Brillouin scattering , 1984 .

[2]  Bauer,et al.  Detailed Characterization of Electron Plasma Waves Produced by Stimulated Raman Scattering. , 1996, Physical review letters.

[3]  R. Kirkwood,et al.  Resonant stimulated Brillouin interaction of opposed laser beams in a drifting plasma , 1998 .

[4]  Effect of spatial turbulence on parametric instabilities , 1979 .

[5]  B. Cohen,et al.  Stimulated scattering of light by ion modes in a homogeneous plasma: Space-time evolution , 1979 .

[6]  Rose,et al.  Nonlinear coupling of stimulated Raman and Brillouin scattering in laser-plasma interactions. , 1987, Physical review letters.

[7]  W. Kruer,et al.  Nonlinear features of stimulated Brillouin and Raman scattering , 1989 .

[8]  J. Lindl.  Development of the indirect‐drive approach to inertial confinement fusion and the target physics basis for ignition and gain , 1995 .

[9]  R. P. Drake,et al.  The influence of subsidiary Langmuir decay on the spectrum of stimulated Raman scattering , 1991 .

[10]  D. Villeneuve,et al.  Stimulated Brillouin scattering in picosecond time scales: Experiments and modeling , 1993 .

[11]  H. Rose.  Saturation of Stimulated Brillouin Scatter by Self Consistent Flow Profile Modification , 1997 .

[12]  Schmitt,et al.  Reduction of Raman scattering in a plasma to convective levels using induced spatial incoherence. , 1989, Physical review letters.

[13]  H. Vu.  Three-dimensional particle-in-cell simulations of ion-driven parametric instabilities , 1997 .

[14]  R. Kirkwood,et al.  Observation of multiple mechanisms for stimulating ion waves in ignition scale plasmas. Revision 1 , 1997 .

[15]  D. F. DuBois,et al.  Quantitative comparison of reduced-description particle-in-cell and quasilinear-Zakharov models for parametrically excited Langmuir turbulence , 2000 .

[16]  Rose,et al.  Observed Dependence of Stimulated Raman Scattering on Ion-Acoustic Damping in Hohlraum Plasmas. , 1996, Physical review letters.

[17]  V. Tikhonchuk,et al.  Effect of the speckle self-focusing on the stationary stimulated Brillouin scattering reflectivity from a randomized laser beam in an inhomogeneous plasma , 1997 .

[18]  Vladimir T. Tikhonchuk,et al.  Modeling of a stimulated Brillouin scattering experiment with statistical distribution of speckles , 1996 .

[19]  Scott C. Wilks,et al.  Energy transfer between crossing laser beams , 1996 .

[20]  G. Bonnaud,et al.  Landau damping of an electron plasma wave in a plasma with modulated density. , 1999, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[21]  J. Goodman.  Statistical Optics , 1985 .

[22]  A. Langdon,et al.  Resonantly excited nonlinear ion waves , 1997 .

[23]  A. Langdon,et al.  Landau‐fluid simulation of laser filamentation , 1994 .

[24]  M. Rosenbluth.  Parametric Instabilities in Inhomogeneous Media , 1972 .

[25]  James F. Drake,et al.  Parametric Instabilities of Electromagnetic Waves in Plasmas , 1974 .

[26]  Temporal behavior of backscattering instabilities in a three-dimensional cylindrical hot spot: I. Standard decay regime , 1999 .

[27]  D. Villeneuve,et al.  Coexistence of stimulated Raman and Brillouin scattering in laser‐produced plasmas , 1991 .

[28]  C. Labaune,et al.  Time-resolved measurements of secondary Langmuir waves produced by the Langmuir decay instability in a laser-produced plasma , 1998 .

[29]  C. Tang.  Saturation and Spectral Characteristics of the Stokes Emission in the Stimulated Brillouin Process , 1966 .

[30]  A. Rubenchik,et al.  Effects of plasma long‐wavelength hydrodynamical fluctuations on stimulated Brillouin scattering , 1996 .

[31]  S. Ghosal,et al.  Nonlinear theory of power transfer between multiple crossed laser beams in a flowing plasma , 1998 .

[32]  Bauer,et al.  Location of ion-acoustic waves from back and side stimulated Brillouin scattering. , 1996, Physical review letters.

[33]  S. Depierreux,et al.  Nonlinear modification of laser–plasma interaction processes under crossed laser beams , 1999 .

[34]  W. Rozmus,et al.  Saturation of stimulated Raman scattering by Langmuir and ion‐acoustic wave coupling , 1993 .

[35]  C. Labaune,et al.  Suppression of stimulated Brillouin scattering by seeded ion wave mode coupling , 1998 .

[36]  Phase‐inflection parametric instability behavior near threshold with application to laser–plasma stimulated Raman scattering (SRS) instabilities in exploding foils , 1989 .

[37]  Bruce I. Cohen,et al.  NONLINEAR INTERACTION OF ELECTROMAGNETIC WAVES IN A PLASMA DENSITY GRADIENT , 1973 .

[38]  W. Kruer,et al.  The Physics of Laser Plasma Interactions , 2019 .

[39]  C. Joshi,et al.  Observation of resonant energy transfer between identical-frequency laser beams , 1998 .

[40]  Baldis,et al.  Resonant Seeding of Stimulated Brillouin Scattering by Crossing Laser Beams. , 1996, Physical review letters.

[41]  Rose,et al.  Saturation of stimulated Raman scattering by the excitation of strong Langmuir turbulence. , 1993, Physical review letters.

[42]  Joshua E. Rothenberg,et al.  Stimulated Raman and Brillouin scattering of polarization-smoothed and temporally smoothed laser beams , 1999 .

[43]  C. Labaune,et al.  Interplay between ion acoustic waves and electron plasma waves associated with stimulated Brillouin and Raman scattering , 1997 .

[44]  A. B. Langdon,et al.  Theory and three‐dimensional simulation of light filamentation in laser‐produced plasma , 1993 .