Scalable low-modal-crosstalk mode-group demultiplexer for MDM transmission over MMF

Jian Cui; Yu Deng; Zhuo Liu; Bin Hao; Daiwei Tan; Chao Wu; Leimin Zhang; Juhao Li; Yongqi He; Qi Wan

doi:10.1117/12.3022585

25 January 2024 Scalable low-modal-crosstalk mode-group demultiplexer for MDM transmission over MMF

Jian Cui, Yu Deng, Zhuo Liu, Bin Hao, Daiwei Tan, Chao Wu, Leimin Zhang, Juhao Li, Yongqi He, Qi Wan

Proceedings Volume 12972, International Academic Conference on Optics and Photonics (IACOP 2023); 129720D (2024) https://doi.org/10.1117/12.3022585
Event: International Academic Conference on Optics and Photonics (IACOP 2023), 2023, ONLINE, China

Abstract

Weakly-coupled mode-division multiplexing (MDM) transmission technique over widely-deployed multimode fiber (MMF) is considered a promising approach to enhance the capacity of optical fiber communication systems. In order to be compatible with cost-efficient intensity-modulation/direct-detection (IM/DD) systems, effective mode-group demultiplexing approaches to simultaneously receive each mode group of MMF are highly desired. In this paper, we propose a scalable low-modal-crosstalk mode-group demultiplexer over MMF using multi-plane light conversion (MPLC), in which input Hermite-Gaussian (HG) modes of MMF are first converted to bridging modes that composed of HG₀₀ modes distributed as a right-angled triangle in Cartesian coordinates, and then each HG₀₀ mode belonging to the same mode group are respectively converted to different HG_n0 modes at the same output for simultaneous detection. With the help of bridging modes, the MPLC-based mode-group demultiplexer can scale to demultiplex more mode groups with relatively few phase masks. A 5 mode-group demultiplexer is also design for demonstration, and simulation results show that the modal-crosstalk are lower than -22.26 dB for all mode groups.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jian Cui, Yu Deng, Zhuo Liu, Bin Hao, Daiwei Tan, Chao Wu, Leimin Zhang, Juhao Li, Yongqi He, and Qi Wan "Scalable low-modal-crosstalk mode-group demultiplexer for MDM transmission over MMF", Proc. SPIE 12972, International Academic Conference on Optics and Photonics (IACOP 2023), 129720D (25 January 2024); https://doi.org/10.1117/12.3022585

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KEYWORDS

Demultiplexers

Crosstalk

Optical transmission

Design

Multiplexing

Optical simulations

Telecommunications

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