The macro-bending loss of multimode step-index helical, s-shaped, and figure-of-eight-shaped optical fibers is investigated by ray-tracing simulation. In particular, fibers with the same radius of curvature having the three different configurations are compared. It is found that macro-bending loss strongly depends on the configuration as well as the bending curvature of the fibers. For the same curvature, the macro-bending loss of fibers in different configurations differs markedly. Thus, when comparing or reporting the macro-bending loss of multimode optical fibers, it is necessary to specify the bending radius as well as the fiber configuration.

中文翻译：

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射线追踪模拟研究宏弯曲损耗对多模光纤弯曲构型的影响

通过射线追踪仿真研究了多模阶跃螺旋，S形和八字形光纤的宏观弯曲损耗。特别地，比较具有三种不同构造的具有相同曲率半径的纤维。已经发现，宏观弯曲损失很大程度上取决于纤维的构造以及弯曲曲率。对于相同的曲率，不同构型的纤维的宏观弯曲损失明显不同。因此，当比较或报告多模光纤的宏观弯曲损耗时，必须指定弯曲半径以及光纤配置。