School of Physics;
Northwest University;
Xian 710069;
China;
Faculty of Science;
Qinzhou University;
Qinzhou 535000;
China;
Shaanxi Key Laboratory for Theoretical Physics Frontiers;
Xian 710069;
China;
Institute of Modern Physics;
Northwest University;
Xian 710069;
China;
asymmetric soliton pulse; asymmetric discontinuous spectrum; exponential dispersion decreasing fiber;