中文摘要：

本文发展了郭旗等人的唯像理论，发现在铅玻璃中，孤子随着本身功率或者抽运光孤子功率几十个毫瓦的变化，就会出现仃的附加相移．基于抽运光孤子功率对弱信号光孤子相位有着高调制灵敏度的结论，提出了一种较可行的光开关实现方案．

英文摘要：

Compared with local spatial optical solitons and linearly propagating beams, nonlocal spatial optical solitons each have a large phase shift during their propagation. However no one has paid attention to the intrinsic characteristics since the theoretical proof by Guo. We develop the phenomenological theory of Guo and find that there appears 7r phase shift with the change of the soliton power or the power of the pump soliton. Based on the conclusion that the modulation of the pump-soliton power on the signal-soliton phase has a high sensitivity, we propose a feasible scheme of realizing the optical switch.