等离子体四波混频精确解反射光栅位形

EXACT SOLUTION OF THE FWM IN PLASMAS IN THE CASE OF REFLECTION GRATING

给出了均匀磁化等离子体介质中的简并与近简并的寻常波四波混频形成反射光栅位形时的普适非线性耦合方程组。在不作无衰减抽运近似的情况下,得到了任意复耦合系数时的方程组的精确解。其解不仅可以推广到各种等离子体形态,而且可以推广到光致折射材料中去。对进一步理论研究四波混频相位共轭,发展新的非线性光学器件可能有所帮助。

The universal degenerate and nearly degenerate FWM nonlinear equations in uniform magnetized plasma are given for the formation of reflection grating configuration and its exact solution appropriated for arbitrary complex coupling parameters under undepleted pump assumption is obtained. The solution is quite suited to various plasma situations but also can be extended to photorafractive materials. It is hoped that it may be helpful for further studying FWM' s phase conjugation theory and developing new nonlinear optical device , especially , for developing new fusion diagnostics by using FWM's principle.