摘要
本文以折射率改变为正的光伏晶体为例,讨论在其中形成双色光光伏空间孤子的条件。一般来说在满足上述条件的情况下,双色光可以形成双色亮孤子、双色暗孤子、一亮一暗孤子。对于一个波长的光(ray2)单独不能形成亮孤子(它的 Glass 系数与背景光的 Glass 系数之比 R_2小于1)的情况,如果再加上一束另一个波长的光(rayl)且其 Glass 系数与背景光的 Glass 系数之比 R_1大于1,则在一定条件下,这个双色光中两个颜色的光可以都形成亮孤子。这实际上提供了一种光控光的新方案。我们还讨论了 rayl 的光强对孤子宽度的影响。
We discuss the conditions under which some polychromatic light photovoltaic spa- tial solitons can be formed in a photorefractive crystal with positive perturbation refractive in- dex.Generally,under those conditions we can form bright-bright、dark-dark and bright -dark polychromatie light photovoltaic spatial solitons in the crystal.In the case of bright- bright soliton,if we lunch a monochrome beam(ray2,its effective Glass constant is less than that of background),bright soliton can not be obtained.But if we add another mono- chrome beam(rayl,its effective Glass constant is larger than that of background beam), both rayl and ray2 can form bright solitons under some condition.This give a new way to control ray2 with rayl.It show that the width of bright-bright solitons can be modified by the peak intension of rayl.
出处
《中山大学研究生学刊（自然科学与医学版）》
2002年第3期28-36,共9页
Journal of the Graduates Sun YAT-SEN University(Natural Sciences.Medicine)
