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Dark Spatial Solitary Wave Due to Cascaded x(2) Nonlinearity
Authors:GAO Guan-Qie CHEN Xian-Feng CHEN Yu-Ping WANG Fei-Yu XIA Yu-Xing
Institution:Institute of Optics and Photonics, Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China Institute of Optics and Photonics, Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China Institute of Optics and Photonics, Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China Institute of Optics and Photonics, Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China Institute of Optics and Photonics, Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
Abstract:The formation of the dark spatial solitary wave in cascaded second harmonic generation processes is numerically studied based on the nonlinear-coupled equations. It is shown that the solitary wave exists when the effective three-order nonlinearity induced by cascaded second-order nonlinearity is negative.
Keywords:cascaded nonlinearity  dark spatial soliton
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