Optics and Photonics Society of Iran

This article was devoted to investigate the formation of soliton and oscillation waves in propagation of laser beam through the plasma. Low and high incident laser intensity under different plasma frequencies were studied. We have investigated laser envelope solitons, plasma electrostatic wake fields and plasma density sharp peaks in relativistic laser-plasma interaction. Our final results was devoted to understand the behavior of solitons in competition between laser intensity and plasma frequency. It is observed that the frequency range of the solitons formation are 3 to 9, 1.8 to 9, 3 to 9, 1.8 to 9 and 1.1 to 8, for the normalized laser intensities are, respectively, 0.1 (non relativistic), 0.8 (near of relativistic border), 1.5 (above of relativistic border), 3 (relativistic) and 10 (ultra relativistic).