Drljača Branko, Savović Svetislav, Kovačević Milan S, Simović Ana, Kuzmanović Ljubica, Djordjevich Alexandar, Min Rui
Faculty of Sciences and Mathematics, University of Priština in Kosovska Mitrovica, L. Ribara 29, 38220 Kosovska Mitrovica, Serbia.
Faculty of Science, University of Kragujevac, R. Domanovića 12, 34000 Kragujevac, Serbia.
Polymers (Basel). 2021 Dec 1;13(23):4218. doi: 10.3390/polym13234218.
By solving the time-dependent power flow equation, we present a novel approach for evaluating the bandwidth in a multimode step-index polymer photonic crystal fiber (SI PPCF) with a solid core. The bandwidth of such fiber is determined for various layouts of air holes and widths of Gaussian launch beam distribution. We found that the lower the NA of SI PPCF, the larger the bandwidth. The smaller launch beam leads to a higher bandwidth for short fibers. The influence of the width of the launch beam distribution on bandwidth lessens as the fiber length increases. The bandwidth tends to its launch independent value at a particular fiber length. This length denotes the onset of the steady state distribution (SSD). This information is useful for multimode SI PPCF applications in telecommunications and optical fiber sensing applications.
通过求解含时潮流方程，我们提出了一种评估具有实心纤芯的多模阶跃折射率聚合物光子晶体光纤（SI PPCF）带宽的新方法。针对气孔的各种布局和高斯发射光束分布的宽度，确定了此类光纤的带宽。我们发现，SI PPCF的数值孔径（NA）越低，带宽越大。较小的发射光束会使短光纤具有更高的带宽。随着光纤长度增加，发射光束分布宽度对带宽的影响会减小。在特定光纤长度下，带宽趋于其与发射无关的值。此长度表示稳态分布（SSD）的起始点。该信息对于多模SI PPCF在电信和光纤传感应用中的应用很有用。
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