Design and Characteristics of Diamond-Assisted Ring-Core Fiber for Space Division Multiplexing

• Published in: Photonics Vol. 9; no. 10; p. 766
• Main Authors: Song, Yujing, Zheng, Jingjing, Pei, Li, Huang, Jing, Ning, Tigang, Li, Jing, Wang, Jianshuai, Bai, Bing
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.10.2022
• Subjects: Birefringence; C band; degenerate mode; effective refractive index difference; few-mode fiber; Fiber optics; Fibers; Low level; Multiplexing; Refractivity; Separation; Signal processing; space division multiplexing; Symmetry

In this paper, a novel diamond-assisted ring-core fiber (DRF) is proposed. With the introduction of a low-refractive-index diamond-shaped region located in the center of the core, the proposed fiber effectively eliminates spatial degeneracy of the LPmn mode groups and maintains a low level of birefr...