Large phase shift of (1+1)-dimensional nonlocal spatial solitons in lead glass

• DOI: 10.1016/j.optcom.2014.10.016
• Publication Date: 2014-10-18T07:07:18Z
• Authors: Qian Shou; Miao Wu; Qi Guo
• Keywords: 0103 physical sciences; FOS: Physical sciences; Pattern Formation and Solitons (nlin.PS); Nonlinear Sciences - Pattern Formation and Solitons; 01 natural sciences; Physics - Optics; Optics (physics.optics)

The large phase shift of strongly nonlocal spatial optical soliton(SNSOS) in the (1+1)-dimensional [(1+1)D] lead glass is investigated using the perturbation method. The fundamental soliton solution of the nonlocal nonlinear Schodinger equation(NNLSE) under the second approximation in strongly nonlocal case is obtained. It is found that the phase shift rate along the propagation direction of such soliton is proportional to the degree of nonlocality, which indicates that one can realize Pi-phase-shift within one Rayleigh distance in (1+1)D lead glass. A full comprehension of the nonlocality-enhancement to the phase shift rate of SNSOS is reached via quantitative comparisons of phase shift rates in different nonlocal systems.