利用牛顿法数值计算光纤的传播常数，这样利用传播常数与色散的关系，就可以画出光纤的色散曲线-Numerical calculation using Newton' s method the fiber propagation constant, so that the use of the propagation constant and the dispersion relations, we can draw the dispe

lamb波色散曲线，表明声速与频率之间关系(Lamb wave dispersion curves show that the relationship between velocity and frequency)

matlab，二维声子晶体的z模式和xy模式的色散关系曲线的计算程序(The program of bandgap calculation of 2D phononic crystals by matlab)