Evolution of Dark Spatial Soliton in Quasi-phase-matched Quadratic Media
We theoretically investigate the evolvement of dark spatial soliton with cascading quadratic nonlinearity in quasi-phase-matched second harmonic generation. It is shown that the dark solitary wave can propagate stably when background intensity is large enough, in which diffraction of beam can be balanced by the cascading quadratic nonlinearity. We also analyze the influence of phase-mismatch on the stability of dark soliton propagation.
作 者： WANG Fei-yu CHEN Xian-Feng CHEN Yu-Ping YANG Yi XIA Yu-Xing 作者单位： Department of Physics, the State Key Laboratory on Fiber-Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai Jiao Tong University, Shanghai 200240, China 刊 名： 理论物理通讯（英文版） ISTIC SCI 英文刊名： COMMUNICATIONS IN THEORETICAL PHYSICS 年，卷(期)： 2005 43(4) 分类号： 关键词： dark spatial soliton cascaded quadratic nonlinearity