Abstract

Orbital angular momentum (OAM) multiplexing technology is expected as one of the prospective candidates for sustaining the further increment of data-transmission capacity in the optical communication systems. Advanced multiplexing technology of combining OAM-based mode division multiplexing (MDM) in the multicore fiber (MCF) with wavelength division multiplexing (WDM) can further improve the transmission rate and spectrum efficiency in the communication systems. In this paper, a multi-ring-air-core fiber (MRACF) supporting thousands of OAM modes is designed and analyzed. The tradeoffs between ring number/density and their corresponding system performance parameters in this fiber are systematically investigated. Based on the analytical results, MRACF with 37 rings can support a record high 4440 radially fundamental OAM modes at 1550 nm, featuring <−53 dB inter-ring crosstalk and >5.67 × 10⁻⁴ intra-ring modal effective refractive index difference. Furthermore, a record-high 4144 radially fundamental OAM modes with <−40 dB inter-ring crosstalk can be supported across C and L bands from 1530 nm to 1625 nm, which is one order of magnitude larger than the number of linearly polarized (LP) modes or supermodes ever reported within one single fiber.

Seven air-core fibers with germanium-doped high-index rings supporting hundreds of OAM modes

Yingning Wang, Kunbi Zhu, Wenqian Zhao, Wenpu Geng, Yuxi Fang, Changjing Bao, Yongxiong Ren, Hao Zhang, Weigang Zhang, Zhongqi Pan, and Yang Yue
Opt. Express 29(13) 19540-19550 (2021)

19-ring-air-core fiber supporting thousands of OAM modes for spatial division multiplexing

Yingning Wang, Wenqian Zhao, Jiahe Hu, Zhi Wang, Yan-ge Liu, Changjing Bao, Yongxiong Ren, Zhongqi Pan, and Yang Yue
Opt. Lett. 47(9) 2206-2209 (2022)

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

Xi Zhang, Shi Chen, and Jian Wang
Opt. Express 30(20) 35828-35839 (2022)

Design of a multi-core photonic crystal fiber supporting 518 OAM modes

Qiang Liu, Mingzhu Han, Haiwei Mu, Wei Liu, Wenjing Li, Kaiyu Wang, Chao Ma, Jingwei Lv, Paul K. Chu, and Chao Liu
J. Opt. Soc. Am. B 40(11) 2913-2919 (2023)

OAM mode multiplexing in weakly guiding ring-core fiber with simplified MIMO-DSP

Shi Chen, Shuhui Li, Liang Fang, Andong Wang, and Jian Wang
Opt. Express 27(26) 38049-38060 (2019)