Impact of linear mode coupling on nonlinear interactions in multi mode fibers with mode dependent losses

空分复用提供了非常有吸引力的方法来增加每根光纤的数据传输容量，其方式是可以根据预测的需求来支持互联网中的未来业务增长。特别是模分复用显示出最大的容量增加的潜力，结合有前途的潜力，以减少成本和能量每传输比特。传输光纤中的非线性相互作用降低了信号质量。只有当非线性相互作用的影响可以精确可靠地预测时，在载波网络中部署模分复用似乎才是可行的。线性模耦合对非线性相互作用引起的信号退化量有很大影响。在模式之间的强耦合的情况下，平均显著地减少了由于非线性效应而导致的信号退化。最近的出版物表明，在介质耦合强度的制度中的非线性效应造成的信号损伤的显着增加。由于目前可用的光纤通常不具有所有模式之间的强耦合，因此必须澄清在何种条件下非线性损伤的影响会增加多少。可靠的预测有关的传输范围在多模光纤取决于他们的特点，只有更多的知识模式耦合和非线性损伤的相互作用是可能的。

Space division multiplexing offers very attractive approaches for increasing the data transport capacity per optical fiber in a way that future traffic growth in the internet can be supported in accordance with predicted demand. Especially mode division multiplexing shows the largest potential for capacity increase combined with promising potential to reduce the cost and energy per transported bit. Nonlinear interactions in the transmission fiber degrade the signal quality. Deploying mode division multiplexing in carrier networks seems feasible only, if the impact of nonlinear interactions can be predicted precisely and reliably.Linear mode coupling has a strong impact on the amount of signal degradation caused by nonlinear interactions. In case of strong coupling between modes, averaging significantly reduces the signal degradation due to nonlinear effects. Recent publications indicate a significant increase of the signal impairments resulting from nonlinear effects in the regime of medium coupling strength. As currently available fibers typically do not feature strong coupling between all modes, it has to be clarified, under which conditions the impact of nonlinear impairments increases how much. Reliable predictions concerning the transmission reach in multi mode fibers depending on their characteristics are only possible with more knowledge about the interplay of mode coupling and nonlinear impairments.