Comparison of Geometrically Shaped and Probabilistically Shaped Bit-Loading DMT for Optical Interconnect System

Junjie Ding; Jiao Zhang; Jianjun Yu

doi:10.1109/JPHOT.2020.2979752

IEEE Photonics Journal (Jan 2020)

Comparison of Geometrically Shaped and Probabilistically Shaped Bit-Loading DMT for Optical Interconnect System

Junjie Ding,
Jiao Zhang,
Jianjun Yu

Affiliations

Junjie Ding: ORCiD; Key Laboratory for Information Science of Electromagnetic Waves, Fudan University, Shanghai, China
Jiao Zhang: ORCiD; Key Laboratory for Information Science of Electromagnetic Waves, Fudan University, Shanghai, China
Jianjun Yu: Key Laboratory for Information Science of Electromagnetic Waves, Fudan University, Shanghai, China

DOI: https://doi.org/10.1109/JPHOT.2020.2979752
Journal volume & issue: Vol. 12, no. 2
pp. 1 – 8

Abstract

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We experimentally demonstrate the transmission performance of the bit-loading discrete multi-tone (DMT) signal in intensity modulation and direct detection (IM-DD) system with a transmission distance of 2km and a net data rate of 108-Gb/s by two different shaping methods. A detailed comparison between the application of geometric shaping (GS) and probabilistic shaping (PS) in bit-loading DMT is presented. With continuous entropy loading for better channel fitting, probabilistically shaped bit-loading DMT achieves 1-dB receiver sensitivity gain compared to the conventional bit-loading DMT and outperforms geometrically shaped bit-loading DMT in the transmission experiment.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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