多模光纤中的自相位调制

SelfPhase Modulation in Multimode Fibers

考虑到起源于三阶电极化率χ（３）实部的非线性折射率所引起的自相位调制现象（ＳＰＭ）对光场分布的影响，经过一些近似处理，求解了多模光纤中的高斯光脉冲传输方程，所得结果与传统的单模光纤自相位调制理论不同．

Effect of selfphase modulation(SPM) on the distribution of the optical fields, which is caused by nonlinear refraction originating from the thirdorder susceptibility Reχ(3), is considered. Through some approximations, the equation that governs the propagation of Gaussian optical pulses in multimode fibers is solved. The results are different from that of conventional selfphase modulation in singlemode fibers.