实验研究了高非线性光子晶体光纤中模式控制的非线性过程,利用激发出高阶模式获得上转换到可见光波段的色散波.通过控制输入飞秒激光的偏振方向,获得了两组相互正交的高阶模式的非线性输出.进一步在光子晶体光纤空气孔包层中注入蜡修整纤芯结构,使得正交模式的有效模折射率差降低,从而形成简并的模式,并通过叠加简并模式获得了中空模场的输出. The non-linearity of mode control in high nonlinear photonic crystal fiber is experimentally studied, and the high-order mode is excited to obtain the dispersion wave which is upconverted to visible light. By controlling the polarization direction of the input femtosecond laser, two groups of orthogonal Of the nonlinear output of the higher order mode.Finally, a wax trim core structure is injected into the photonic crystal fiber air hole cladding to reduce the effective mode refractive index difference of the orthogonal mode to form a degenerate mode, Mode to obtain the output of the hollow mode field.