In this article, we propose, investigate, and analyze a novel designed two guided modes regions ring-core photonic crystal fiber (PCF) with relatively greater effective refractive index separation and also high isolation value which can be negligible the crosstalk among the guided channels. The designed PCF can be well supported up to 76 orbital angular momentum (OAM) modes and 6 linear polarization (LP) modes over 800 nm bandwidth. The background and ring-core materials of the proposed PCF are silicon and Shcott sulfur difluoride (SF2) glass, respectively. All characteristic features of the proposed PCF are successively analyzed using the finite element method (FEM) and the perfectly matched layer (PML) as a boundary condition within the COMSOL Multiphysics simulator. The designed PCF possess the good propagation features because the results show that the better mode quality (96%), the isolation value is kept above 72 dB that produces the very low crosstalk between the guided channels, high numerical aperture, relatively flat and small dispersion variations, and low confinement loss, etc. Therefore, these outstanding properties of the designed PCF prove that it has potential applications to enable the large-capacity transmission along with the high-speed optics communications.

在本文中，我们提出，研究和分析了一种新颖设计的两个引导模式区域的环形芯光子晶体光纤（PCF），具有相对较大的有效折射率分离和较高的隔离值，可以忽略引导通道之间的串扰。在800 nm带宽上，所设计的PCF可以很好地支持多达76个轨道角动量（OAM）模式和6个线性极化（LP）模式。拟议的PCF的背景材料和环芯材料分别是硅和Shcott二氟化硫（SF2）玻璃。在COMSOL Multiphysics模拟器中，使用有限元方法（FEM）和完美匹配层（PML）作为边界条件，对所提出的PCF的所有特征进行了连续分析。