(1+2)维强非局域空间光孤子的相互作用

强非局域空间光孤子是指满足强非局域条件的空间孤子.在Snyder和Mitchell工作的基础上，获得了不共面对称斜入射(1+2)维强非局域空间光孤子对相互作用问题的精确解析解.结果表明，光束初始中心距离在大范围尺度内变化时，双孤子的演化都能形成类似DNA结构的稳定缠绕，这种稳定缠绕的结构与双孤子的初始相位差无关；光束中心在横截面上的投影轨迹一般是一个斜椭圆，通过改变两光束的初始中心距离和倾斜度可以控制该椭圆轨迹的变化.指出了利用(1+2)维强非局域空间光孤子的相互作用特性实现平面全光开关和全光互联的潜在可能性.关键词：(1+2)维非局域非线性介质空间光孤子的相互作用全光开关全光互联

(1+2)D interaction of strong nonlocal optical spatial solitons

Strong optical spatial solitons are solitons that satisfy the strong nonlocal condition.We discuss the nonplanar interaction of a pair of (1+2)D optical spatial solitons with symmetrical oblique incidence on the basis of Snyder and Mitchell's revolutionary work［Accessible solitons.Science,1997,276(6):1538—1541］.An accurate analytical solution in Gaussian form is obtained for the first time.It is shown that rrapping of two beams in a stable spiraling is possible for a large range of parameters.The spiraling structure does not depend on the initial relative phase.The projection of the wto beam centers in the transverse coordinate plane lies always in the same ellipse.It is possible to find its applications in planar all-optical swithching and all-optical interconnection in bulk media.