利用FDTD方法模拟普通光子晶体光纤中模场变化的情况，为主程序，可以为学习FDTD模拟PCF的学习者提供一定参考和学习。-Ordinary FDTD simulation using photonic crystal fiber mode field changes in the situation, the main program, you can learn from FDTD simulation for the PCF to provide a reference of learners and learning.