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Weakly coupled 4-mode step-index FMF and demonstration of IM/DD MDM transmission
Author(s): Min Jiang; Jinglong Zhu; Jiali Wei; Juhao Li; Yongqi He; Zhangyuan Chen; Zhengbin Li
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Paper Abstract

Weakly-coupled mode division multiplexing (MDM) over few-mode fiber (FMF) for short-reach transmission has attracted great interest, which can avoid multiple-input-multiple-output digital signal processing (MIMO-DSP) by greatly suppressing modal crosstalk. In this paper, step-index FMF supporting 4 linearity polarization (LP) modes for MIMO-free transmission is designed and fabricated for the first time. Modal crosstalk of the fiber is suppressed by increasing the mode effective refractive index differences. The same fabrication method as standard single-mode fiber is adopted so that it is practical and cost-effective. The mode multiplexer/demultiplexers (MUX/DEMUX) consists of cascaded mode-selective couplers (MSCs), which are designed and fabricated by tapering the proposed FMF with single-mode fiber (SMF). The mode MUX and DEMUX achieve very low modal crosstalk not only for the multiplexing/demultiplexing but also for the coupling to/from the FMF. Based on the fabricated FMF and mode MUX/DEMUX, we successfully demonstrate the first simultaneous 4-modes (LP01, LP11, LP21 & LP31) 10-km FMF transmission with 10-Gb/s intensity modulation and MIMO-free direct detection (IM/DD).

Paper Details

Date Published: 14 February 2019
PDF: 4 pages
Proc. SPIE 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018), 110483T (14 February 2019); doi: 10.1117/12.2519613
Show Author Affiliations
Min Jiang, National Ocean Technology Ctr. (China)
Jinglong Zhu, Peking Univ. (China)
Jiali Wei, System Engineering Research Institute (China)
Juhao Li, Peking Univ. (China)
Yongqi He, Peking Univ. (China)
Zhangyuan Chen, Peking Univ. (China)
Zhengbin Li, Peking Univ. (China)


Published in SPIE Proceedings Vol. 11048:
17th International Conference on Optical Communications and Networks (ICOCN2018)
Zhaohui Li, Editor(s)

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