Design of weakly-coupled three-spatial-mode rectangular-ring core fiber for short-reach MDM networks in C + L band

• DOI: 10.1007/s11082-018-1545-6
• Publication Date: 2018-07-02T09:06:47Z
• Authors: Fang Ren; Xiaoshan Huang; Yiying Zhang; Jinyi Yu; Xiaojie Fan; Jianping Wang
• Keywords: Mode (computer interface)

We propose a novel weakly-coupled three-spatial-mode rectangular-ring core fiber for short-reach mode-division multiplexing (MDM) networks in C + L band. We investigate the influence of geometrical parameters on neff, min∆neff, and Aeff with regions that meet the three-spatial-mode condition of the proposed fiber. Bending loss of each guided mode and DMD between adjacent spatial modes are also studied. Large effective refractive index difference between adjacent spatial modes is achieved with min∆neff ~ 0.004. Results imply that the designed fiber can simplify or eliminate MIMO-DSP for short-reach MDM networks such as optical interconnects, data centers, and optical access networks.