| Title | A 6-LP-mode ultralow-modal-crosstalk double-ring-core FMF for weakly-coupled MDM transmission |
| Authors | Ge, Dawei Gao, Yuyang Yang, Yu Shen, Lei Li, Zhengbin Chen, Zhangyuan He, Yongqi Li, Juhao |
| Affiliation | Peking Univ, State Key Lab Adv Opt Commun Syst & Networks, Beijing 100871, Peoples R China Yangtze Opt Fibre & Cable Joint Stock Ltd Co, State Key Lab Opt Fiber & Cable Manufacture Techn, Wuhan 430073, Hubei, Peoples R China Peking Univ, SoC Key Lab, Shenzhen Inst, Shenzhen 518057, Peoples R China |
| Keywords | Fiber design and fabrication Fiber optics communications Fiber characterization Multiplexing |
| Issue Date | 2019 |
| Publisher | OPTICS COMMUNICATIONS |
| Abstract | Weakly-coupled mode division multiplexing (MDM) technique based on few mode fiber (FMF) with low linear-polarized (LP) modal crosstalk is promising for capacity enhancement of short-reach transmission. In this paper, we propose a double-ring-core FMF for simultaneous 6-LP-mode weakly-coupled MDM transmission. FMF with ring-core structure is theoretically analyzed by deriving from a step-index circular-core FMF with perturbed ring areas. Then simplified method is proposed to define boundaries of ring areas in FMF and increase the minimum effective refractive index difference (min vertical bar Delta n(eff)vertical bar) among all the modes. Fabricated by commercial fabrication technique, the FMF achieves a min vertical bar Delta n(eff)vertical bar up to 1.49x10(-3) while its maximum Delta n between core and cladding is only 0.828%, which greatly reduces the difficulty of fiber fabrication. Thanks to the ultralow modal crosstalk of the FMF, we successfully demonstrate simultaneous 6-LP-mode (LP01, LP11, LP21, LP02, LP(31 )and LP12) 4-wavelength 71-km weakly-coupled MDM transmission using 10 Gb/s optical on-off-keying (OOK) intensity modulation and direct detection (IM/DD) without any digital signal processing (DSP). The design method can be extended to weakly-coupled FMFs with more ring areas. |
| URI | http://hdl.handle.net/20.500.11897/544642 |
| ISSN | 0030-4018 |
| DOI | 10.1016/j.optcom.2019.06.015 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 区域光纤通信网与新型光通信系统国家重点实验室 深圳研究生院待认领 |
