The Propagation Properties Of Optical Solitons And Electrostatic Waves In Plasma

Laser driven inertial confinement fusion is the more promising direction of fusion research. The system is considering the transmission of laser in plasma medium. When achieving certain range of condition, plasma as a nonlinear medium, laser can form spatial optical solitons in it. The absorption of laser is one of the key issues to solve fusion problem, thermal electron produced in the process of laser-plasma interaction, preheats ignition target to decline compressed degrees so that affecting the absorption of laser. So It is necessary to make research on electron densities of the electron plasma wave.In this paper, we study the laser-plasma interaction. First, by using the methods of separation of variables and progression, we make solutions to the nonlinear Schr?dinger equation in the strongly nonlocal nonlinear plasma medium, and study the propagation properties of beams in this process. And then by using the methods of self-similar to solve the general nonlinear Schr?dinger equation decided by electron density variable of electron plasma wave, study the evolution process of electron densities. The principal achievements obtained are as the following:1. The initial beam width of the beam is being affected by the quantum number of m and n. The different value of the variable ofβand A, deciding different modulation potential value, can change the Coincidence rate of two peaks and the intensity peaks of optical field. With the distance increasing, the beams evolved from two into one, we can use the characteristics in the coupling between light informations. The modulation of bright soliton and dark soliton showed different propagation properties.2. The electron plasma wave excited in the process of laser-plasma interaction, its electron densities intensity distribution is periodic, and it is determined by the inherent characteristics of laser and plasma. The number and intensity of maximum peaks of electron plasma waves are both affected by m, and display certain change laws. With the changing of quantum number n, the numbers of tremum peaks of electron plasma waves is 2n,and peaks value of electron plasma waves also changes.