Svetislav Savović, Alexandar Djordjevich, Konstantinos Aidinis, Chen Chen, Rui Min
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引用次数: 0
Abstract
The mode coupling in a graded-index polymer photonic crystal fiber (GI PPCF) with a solid core has been investigated using the Langevin equation. Based on the computer-simulated Langevin force, the Langevin equation is numerically integrated. The numerical solutions of the Langevin equation align with those of the time-independent power flow equation (TI PFE). We showed that by solving the Langevin equation, which is a stochastic differential equation, one can successfully treat a mode coupling in GI PPCFs, which is an intrinsically stochastic process. We demonstrated that, in terms of effectiveness, the Langevin equation is preferable compared to the TI PFE. The GI PPCF achieves the equilibrium mode distribution (EMD) at a coupling length that is even shorter than the conventional GI plastic optical fiber (POF). The application of multimode GI PCFs in communications and optical fiber sensor systems will benefit from these findings.
我们利用朗文方程研究了具有固体纤芯的渐变指数聚合物光子晶体光纤（GI PPCF）中的模式耦合。根据计算机模拟的朗格文力，对朗格文方程进行了数值积分。朗格文方程的数值解与时间无关功率流方程（TI PFE）的数值解一致。我们的研究表明，通过求解作为随机微分方程的 Langevin 方程，可以成功地处理 GI PPCF 中的模式耦合，而模式耦合本身就是一个随机过程。我们证明，就有效性而言，朗格文方程比 TI PFE 更为可取。GI PPCF 在耦合长度比传统 GI 塑料光纤（POF）更短的情况下实现了平衡模式分布（EMD）。这些发现将有助于多模 GI PCF 在通信和光纤传感器系统中的应用。
期刊介绍：
Frontiers in Physics publishes rigorously peer-reviewed research across the entire field, from experimental, to computational and theoretical physics. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, engineers and the public worldwide.
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