Initial chirp's effect on chirp caused by polarization modes coupling

In this paper,chirp caused by polarization modes coupling on the input pulse with initial chirp is investigated.The function of chirp is induced through coupled nonlinear Schrodinger equation.Every factor's effect on the chirp is discussed.The results show:input polarization angle causes the chirp differs in the two polarization directions;for a single polarization direction,the weak polarization walk-off effect influences the chirp to a certain degree,while the strong influences little;the initial chirp prominently decides that caused by polarization modes coupling.