损耗对非相干耦合屏蔽光伏亮-亮孤子对演化特性的影响

摘要

为了得到晶体损耗对非相干耦合屏蔽光伏亮-亮孤子对演化特性的影响结果,将两束偏振方向和波长都相同的互不相干的光束作为入射波,采用数值方法求解有耗情况下的波传播方程.结果表明,损耗除了造成屏蔽光伏亮-亮孤子对光波振幅减小外,还造成了孤子对横截面的改变.当入射光强较低时,横截面随传播距离的增长而不断增大;当入射光强较高时,起初横截面不断压缩,而后再膨胀.传播距离短时,可以忽略损耗的影响,当传播距离较大时,损耗将最终导致孤子对崩溃.%In order to obtain the impact of the loss on the evolution of incoherently coupled bright-bright screening-photovoltaic spatial soliton pairs, taking the two mutually incoherent optical beams with the same polarization and wavelength as the input wave, the beam propagation equation in the absence of loss was numerically solved. The result showed that the loss not only resulted in the decrease of the amplitude of soliton pairs,but also resulted in the change of the shape of the soliton pairs. The soliton width increased as the propagation distance increased for bright-bright screening-photovoltaic spatial soliton pairs with low-intensity at the input;whereas the width of soliton pairs decreased initially as the increases of the propagation distance,and then returned to its value at the for the SP soliton pairs with high-intensity at the input. Though the effect of loss on the evolution of SP soliton pairs could be ignored if the propagation distance was short enough,the loss was eventually expected to destroy these soliton paris at long distance.