Cottrell Don M, Davis Jeffrey A
Appl Opt. 2018 Jul 1;57(19):5319-5327. doi: 10.1364/AO.57.005319.
We examine single-mode optical fiber transmission using the angular spectrum method. We find excellent agreement with the theoretical solutions for the cylindrical single-mode optical fiber. Next, we examine fiber coupler configurations with 1×2, 1×3, and 1×5 designs. The input within the central fiber core is broadcast equally into the surrounding fiber cores and then returns with propagation distances as expected. Then we examine supermode theory for the 1×3 case. The initial energy is sent into different combinations of fiber cores where their phase relationship governs the output. Surprisingly, we find evidence of an unexpected mode in some of the multicore designs. We expect these results might be useful for exploration of more complicated fiber core arrays. However, computational times are short using this algorithm.
我们使用角谱方法研究单模光纤传输。我们发现与圆柱形单模光纤的理论解非常吻合。接下来，我们研究了1×2、1×3和1×5设计的光纤耦合器配置。中心光纤芯内的输入光被均匀地广播到周围的光纤芯中，然后按预期的传播距离返回。然后我们研究了1×3情况的超模理论。初始能量被发送到不同组合的光纤芯中，它们的相位关系决定了输出。令人惊讶的是，我们在一些多芯设计中发现了意外模式的证据。我们预计这些结果可能有助于探索更复杂的光纤芯阵列。然而，使用该算法的计算时间很短。
