中文摘要：

分别以He—Ne激光器、半导体激光器和Ar^＋激光器作为光源照射液晶材料，在低光强入射的情况下均观察到了光束的自聚焦现象以及空间光孤子的形成，观察到了长度l〉5mm的孤子波和多模空间光孤子，并对空间孤子的产生条件及特性进行了讨论．

英文摘要：

Using He-Ne laser, semiconductor laser, and Ar^＋ laser as the light sources, we observed the self-focusing phenomena of light wave at low power and the forming of spatial solitons in nematic liquid crystal. The spatial solitons with a length over five millimeters and multiple-mode spatial optical solitons were viewed. Furthermore, the forming conditions and characteristics of these solitons were also discussed.