ZTE

ZTE Communications ›› 2024, Vol. 22 ›› Issue (1): 106-110.DOI: 10.12142/ZTECOM.202401012

• Research Papers • Previous Articles    

Real-Time 4-Mode MDM Transmission Using Commercial 400G OTN Transceivers and All-Fiber Mode Multiplexers

REN Fang1(), LI Yidan1, YE Bing2, LIU Jianguo2, CHEN Weizhang2   

  1. 1.School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083, China
    2.Department of WDM System Design, ZTE Corporation, Beijing 100029, China
  • Received:2023-06-15 Online:2024-03-28 Published:2024-03-28
  • About author:REN Fang (renfang@ustb.edu.cn) received her bachelor's and master's degrees in electronic science and technology from Tianjin University, China in 2008 and 2010, respectively. She received her PhD degree in information electronics from Hokkaido University, Japan in 2014. She is currently an associate professor with the School of Computer and Communication Engineering, University of Science and Technology Beijing, China. Her research interests include optical communication systems, optical devices, deep learning, and simulation with artificial intelligence.
    LI Yidan received her bachelor's degree in communication engineering from Hebei University of Geosciences, China in 2022 and is currently a graduate student at University of Science and Technology Beijing, China. Her current research interests include optical communications.
    YE Bing received his master's degree in electronic engineering from Tsinghua University, China. He currently works with the Department of WDM System Design, ZTE Corporation. His research interests include optical networks and systems and next-generation WDM networks.
    LIU Jianguo received his master's degree in communication and information system from Huazhong University of Science and Technology, China. He currently works with the Department of WDM System Design, ZTE Corporation. His research interests include intelligent optical networks and next-generation WDM networks.
    CHEN Weizhang received his master's degree in communication and information system from Huazhong University of Science and Technology, China. He currently works with the Department of WDM System Design, ZTE Corporation. His research interests include next-generation WDM networks and high-speed integrated photon and optical modules.
  • Supported by:
    the ZTE Industry-University-Institute Cooperation Funds

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Abstract:

Weakly-coupled mode division multiplexing (MDM) technique is considered a promising candidate to enhance the capacity of an optical transmission system, in which mode multiplexers/demultiplexers (MMUX/MDEMUX) with low insertion loss and modal crosstalk are the key components. In this paper, a low-modal-crosstalk 4-mode MMUX/MDEMUX for the weakly-coupled triple-ring-core few-mode fiber (TRC-FMF) is designed and fabricated with side-polishing processing. The measurement results show that a pair of MMUX/MDEMUX and 25 km weakly-coupled TRC-FMF MDM link achieve low modal crosstalk of lower than -17.5 dB and insertion loss of lower than 11.56 dB for all the four modes. Based on the TRC-FMF and all-fiber MMUX/MDEMUX, an experiment for 25 km real-time 4-mode 3-λ wavelength division multiplexing (WDM)-MDM transmission is conducted using commercial 400G optical transport network (OTN) transceivers. The experimental results prove weakly-coupled MDM techniques facilitate a smooth upgrade of the optical transmission system.

Key words: optical fiber couplers, mode (de)multiplexers, mode division multiplexing transmission