Savović Svetislav, Aidinis Konstantinos, Djordjevich Alexandar, Min Rui
University of Kragujevac, Faculty of Science, R. Domanovića 12, 34000 Kragujevac, Serbia.
Department of Electrical Engineering, Ajman University, P.O. Box 346, Ajman, United Arab Emirates.
Heliyon. 2023 May 2;9(5):e15882. doi: 10.1016/j.heliyon.2023.e15882. eCollection 2023 May.
The feasible distance is presented for space division multiplexed (SDM) transmission along multimode silica step-index photonic crystal fiber (SI PCF) by solving the time-independent power flow equation (TI PFE). These distances for two and three spatially multiplexed channels were determined to depend on mode coupling, fiber structural parameters, and launch beam width in order to keep crosstalk in two- and three-channel modulation to a maximum of 20% of the peak signal strength. We found that the length of the fiber at which an SDM can be realized increases with the size of the air-holes in the cladding (higher NA). When a wide launch excites more guiding modes, these lengths become shorter. Such knowledge is valuable for the use of multimode silica SI PCFs in communications.
通过求解与时间无关的功率流方程（TI PFE），给出了沿多模石英阶跃折射率光子晶体光纤（SI PCF）进行空间分割复用（SDM）传输的可行距离。确定了两通道和三通道空间复用的这些距离取决于模式耦合、光纤结构参数和发射光束宽度，以便将两通道和三通道调制中的串扰保持在峰值信号强度的最大20%。我们发现，可以实现SDM的光纤长度随着包层中气孔尺寸的增加（更高的数值孔径）而增加。当宽发射激发更多导模时，这些长度会变短。这些知识对于在通信中使用多模石英SI PCF很有价值。
