双光子吸收效应对孤子和孤子对传输的影响

Effect of twophoton absorption on the propagation of soliton and couple of sol iton

用分步傅立叶变换法求解含双光子吸收效应的光孤子NLS方程,研究了双光子吸收效应对一阶孤子和孤子对传输的影响,发现双光子吸收效应除对孤子产生等效损耗外,还影响了孤子对在传输中的相互作用。在特定的双光子吸收系数条件下双光子吸收效应可以使孤子对平行地向前传输。

The properties of propagation of soliton and couple of soliton includi ng twophoton absorption are studied numerically. The results show that twophoton absorption reduce the soliton amplitude and affects the interaction of couple o f soliton which depend on the twophoton absorption coefficient. Given a special value of the coefficient the couple of soliton can be propagated parallel.