Weakly guiding graded-index ring-core fiber supporting 16-channel long distance mode division multiplexing systems based on OAM modes with low MIMO-DSP complexity

被引：8
作者：
Zhang, X., I [1 ,2 ]
Chen, S. H., I [1 ,2 ]
Wang, J. I. A. N. [1 ,2 ]
机构：
[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Hubei, Peoples R China
[2] Opt Valley Lab, Wuhan 430074, Hubei, Peoples R China
来源：
OPTICS EXPRESS | 2022年 / 30卷 / 20期
基金：
中国国家自然科学基金;
关键词：
ORBITAL ANGULAR-MOMENTUM; TRANSMISSION; DESIGN; WDM;
D O I：
10.1364/OE.464559
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose a weakly guiding graded-index ring-core fiber (RCF) with trench-assisted structure. The simulation analysis indicates that such a special fiber design is able to support 8 orbital angular momentum (OAM) mode groups (MGs) with low inter-group crosstalk (< -25 dB/km) and low intra-group differential mode delay (DMD) (< 125 ps/km) for higher order OAM MGs with topological charge |l| = 4, 5, 6, 7. The designed RCF also shows favorable tolerance characteristics to ellipticity and bending. Moreover, stable and distinguished broadband performance of proposed RCF is verified over the whole C band ranging from 1530 nm to 1565 nm. This kind of fiber design could be employed in small-scale multiple-input multiple-output digital signal processing (MIMO-DSP) intra-group modes multiplexing transmission combined with MIMO-free inter-group mode multiplexing transmission. The simulated results of the designed RCF show its great potential of the 16-channel long-distance mode division multiplexing (MDM) transmission with low MIMO-DSP complexity.(c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码：35828 / 35839
页数：12
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