title: Large phase shift of spatial solitons in lead glass.
abstract: A large phase shift of the strongly nonlocal spatial optical soliton (SNSOS) was predicted by Guo et al. [Phys. Rev. E69, 016602 (2004)]. We investigate the phase shift of the SNSOS in lead glass. It is found that the phase shift rate along the propagating direction of such a soliton is one order larger than that of the local soliton. The theory agrees quantitatively with the experiment on the dependence of the phase shift on the degree of nonlocality. We realize a π-phase shift by changing the optical power by about 10 mW around the critical soliton power, which agrees qualitatively with our theoretical result.
authors: Laboratory of Photonic Information Technology, South China Normal University, Guangzhou, 510631, China.
authors: Qian
authors: Q
authors: Shou
authors: Xiang
authors: X
authors: Zhang
authors: Wei
authors: W
authors: Hu
authors: Qi
authors: Q
authors: Guo