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Nonlinear Kerr and intermodal four-wave mixing effect in mode-division multiplexed multimode fiber link

机译:模分多路复用多模光纤链路中的非线性Kerr和模态四波混合效应

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We represent the effect of nonlinear propagation in mode-division multiplexed multimode fiber (MMF) link. The effect of intermodal four-wave mixing (IMFWM) and intramodal FWM for waves with different spatial modes (LP_(01), LP_(02), LP_(11), and LP_(12)) over MMF has been analyzed with the help of an optical spectrum analyzer using VPI Photonics/VPI transmission Maker™ version 9.7 simulator. It can be concluded that high launch power and low dispersion generated sidebands in the cases of both intermodal and intramodal FWM. These FWM products grow in number with variation in wavelength of probe as well as these products grow toward the central pump frequency of that particular mode. It mathematically represents the multimode nonlinear propagation of different mode groups (containing N spatial modes in each group) in MMF due to Kerr effect. Thus, nonlinear interaction between modes results in interference that degrades the performance of multichannel mode-division multiplexed systems. To achieve full-phase matching and reduce the effect of IMFWM, chromatic dispersion has been increased in each spatial mode throughout the link.
机译:我们代表模分复用多模光纤(MMF)链路中非线性传播的影响。已借助MMF分析了具有不同空间模式(LP_(01),LP_(02),LP_(11)和LP_(12))的波型四波混频(IMFWM)和波型内FWM的影响使用VPI Photonics / VPI Transmission Maker™9.7版模拟器的光谱分析仪的原理图。可以得出结论,在联运和联运FWM的情况下,高发射功率和低分散会产生边带。这些FWM产品的数量随着探头波长的变化而增长,并且这些产品朝该特定模式的中心泵浦频率增长。它用数学方法表示由于Kerr效应在MMF中不同模式组(每个组中包含N个空间模式)的多模非线性传播。因此,模式之间的非线性相互作用导致干扰,从而降低了多通道模式划分多路复用系统的性能。为了实现全相位匹配并减少IMFWM的影响,在整个链路的每个空间模式中增加了色散。

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