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将磁光效应和光纤非线性效应作为微扰,采用导波光耦合理论分析了高非线性光纤中导波光发生磁光四波混频的机理;实验测试了磁场对四波混频偏振依赖性的影响,理论分析与实验结果符合.研究表明,当输入的探测光和抽运光为相互正交的线偏振光时,四波混频的磁控效果最为明显,输出的闲频光功率随磁光耦合系数振荡变化,施加适当的外加磁场可使四波混频效率得到进一步提高.选择适当费尔德常数的光纤材料,利用磁光效应对四波混频偏振依赖性的影响,可实现不同范围的磁场测量.
Taking the magneto-optical effect and the nonlinear effect of the fiber as the perturbation, the mechanism of the magneto-optical four-wave mixing in guided light with high nonlinearity is analyzed by using guided-light coupling theory. The dependence of the magnetic field on the polarization dependence of the four- The results show that when the input probe light and pump light are mutually orthogonal linearly polarized light, the magnetization effect of the four-wave mixing is the most obvious. The output power of the idler frequency changes with the magnetic The optical coupling coefficient changes oscillatingly and the four-wave mixing efficiency can be further improved by applying the appropriate external magnetic field.Optimized by the effect of magneto-optic effect on the polarization dependence of four-wave mixing, Magnetic field measurement.