Increasing needs to energy in the world in recent years caused Mankind looks for new sources of energy. Different approaches to use nuclear energy such as nuclear fusion are commonly considered. There are two methods to obtain sufficient fusion energy gain: inertial confinement fusion (ICF) and magnetic confinement fusion (MCF). In order to reach high energy gain, high density and high temperature in fuel materials are needed. Heating fuel materials such as deuterium and tritium to ignition temperature leads to have a plasma medium. There are several way to heat plasma. To reach to ignition conditions such as compressing the fuel by high intensity beams (in ICF) as using electromagnetic wave (in MCF). Electromagnetic waves heating can produce different instabilities. One of the most important instability is called Raman scattering by that electromagnetic wave decays into a scattered electromagnetic wave and an electron plasma wave (EPW). EPW energies transfer to fuel particles that can heat the plasma. A few percent of incident laser beam energy will be lost by back scattering. This phenomenon causes a reduction in energy gain. In order to suppress Raman backscattering, We had to used a supper Gaussian laser pulses to interact with plasma in a short time then Langmuir wave energy increase before to reach the saturation. Then saturation state of EPW breaks and damping efficiency of energy gain happens. In this method, although SRS peak power is increased but SRS from short pulse grow up from initial time of backscattering wave.