  We developed a new nonlinear fluid laser-plasma-instability code (FLAME)
using a multi-fluid plasma model combined with full electromagnetic wave
equations. The completed one-dimensional (1D) version of FLAME was used to
study laser-plasma instabilities in shock ignition. The simulations results
showed that absolute SRS modes growing near the quarter-critical surface were
saturated by Langmuir-wave Decay Instabilities (LDI) and pump depletion. The
ion-acoustic waves from LDI acted as seeds of stimulated Brillouin Scattering
(SBS), which displayed a bursting pattern and caused strong pump depletion.
Re-scattering of SRS at the 1/16th-critical surface was also observed in a high
temperature case. These results largely agreed with corresponding
Particle-in-Cell simulations.
