Impact of Inter-modal Four-Wave Mixing on the Performance of Mode- and Wavelength-Division-Multiplexing Systems

In this paper, we investigate the impact of inter-modal four-wave mixing on mode- and wavelength-division-multiplexing systems. A set of coupled nonlinear Schrödinger equations, including linear mode coupling, is derived allowing to isolate the inter-modal four-wave mixing terms. The efficiency of inter-modal four-wave mixing between degenerate LP modes is found to be significantly higher than the intra-modal four-wave mixing efficiency. However, it is shown that the inter-modal four-wave mixing efficiency between degenerate modes is significantly reduced by the linear mode coupling. These data support the publication of the same title.本文深入探讨了模态间四次波混频对模分复用和波分复用系统的影响。通过推导出一组耦合的非线性薛定谔方程，其中包括线性模态耦合，使得能够独立出模态间四次波混频项。研究发现，在简并的LP模态之间，模态间四次波混频的效率显著高于模内四次波混频效率。然而，研究表明，简并模态间的模态间四次波混频效率因线性模态耦合而显著降低。这些数据为相同标题的出版物提供了支持。