State Key Laboratory of Information Photonics and Optical Communications;
and School of Science;
Beijing University of Posts and Telecommunications;
Beijing 100876;
China;
School of Information;
University of International Business and Economics;
Beijing 100029;
China;
inhomogeneous optical fiber; Lax pair; coupled time-dependent coefficient fourth-order nonlinear Schrodinger system; vector semi-rational nonautonomous rogue waves; breathers;