双色光光伏空间孤子的形成条件及其应用

The condition for forming a polychromatic light photovoltaic spatial soliton and its application

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 .一般而言 ,在满足上述条件的情况下 ,双色光可以形成双色光亮孤子、双色光暗孤子、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R2 小于 1)的情况 ,如果再加上一束另一个波长的光 (ray1) ,且其Glass系数与背景光的Glass系数之比R1 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 .还讨论了ray1的光强对孤子宽度的影响 .

We discuss the conditions under which some polychromatic light photovoltaic spatial solitons, can be formed in a photorefractive crystal with a positive perturbation refractive index. Generally, under these conditions we can form bright-bright, dark-dark and bright-dark polychromatic light photovoltaic spatial solitons in the crystal. In the case of bright-bright solitons, if we launch a monochromatic beam(ray2, its effective Glass constant is less than that of the background), bright soliton cannot be obtained. But if we add another monochromatic beam(ray1, its effective Glass constant is larger than that of the background beam), both ray1 and ray2 can form bright solitons under some condition. This gives a new way to control ray2 with ray1. It is shown that the width of bright-bright solitons can be modified by the peak intensity of ray1.