在忽略晶体损耗和扩散效应的情况下,讨论了加外电场的光伏光折变晶体中弱光强空间屏蔽光伏明孤子及其演化特性.在弱光强条件下得到了空间屏蔽光伏明孤子的解析解表达式,与运用数值计算的方法所得到的结果十分吻合.该方法解决了以往数值求解动态演化方程时必须先数值求解常微分方程或积分方程的问题.讨论了参量失配情况下空间屏蔽光伏明孤子的动态演化特性.

Neglecting both the crystal loss and the diffusion effect, both the weak light intensity spatial screening photovoltaic (SP) bright solitons in the photovoltaic photorefractive crystal with an applied electric field and their evolution characteristrcs are discussed. The analytic expression for the spatial screening photovoltaic bright solitons obtained under the weak light intensity agrees well with the results obtained by the numerical calculation. This practice solves the previous problem that it is necessary to first solve the differential equation or the integral equation while numerically solving the dynamical evolution equation. The dynamical evolution of the spatial screening photovoltaic bright solitons under the condition of parameter mismatch is also discussed.