通过考虑扩散效应的影响,采用数值方法,研究了一维稳态闭路光伏暗空间孤子的自偏转特性。结果表明,在扩散项的影响下,光伏暗空间孤子光束的中心沿一个抛物线轨迹在光折变晶体光轴方向上产生偏转；孤子中心偏转距离随光伏场以及入射孤子波强度的增加而单调增加。光伏暗空间孤子与明孤子的自偏转规律有明显不同。

The selfdeflection characteristic of dark photovoltaic spatial solitons in onedimensional stable closed circuit is investigated by taking diffusion effects into account by use of numerical method. The results show that dark photovoltaic spatial soliton possesses a selfdeflection process in the direction of the crystal’s axis during propagation and the center of the dark solitary beam moves on a parabolic trajectory. The selfbending distance of the dark solitary beam increases monotonously with the photovoltaic field and the solition input intensity. The self-deflection of dark photovoltaic solitons is very different from that of bright ones.