Real-time 60 Gb/s PS-64QAM SSB-DMT transceiver deploying a low-complexity distribution matcher in band-limited IM-DD system

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Optical Fiber Technology Pub Date : 2024-11-21 DOI:10.1016/j.yofte.2024.104048

Long Zhang , Xiongwei Yang , Kaihui Wang , Chen Wang , Bohan Sang , Jianyu Long , Junjie Ding , Jiao Zhang , Min Zhu , Jianjun Yu , Fellow, IEEE and OSA

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Abstract

In this work, we have implemented a low-complexity distribution matcher in real-time for bandwidth-limited intensity modulation and direct detection (IM/DD) system based on field programmable gate array (FPGA). For the hardware implementation of probabilistic shaping (PS), a simple and effective distribution matcher is the key to achieving the symbol of the target probability. Compared to traditional PS distribution matchers, our proposed distribution matcher has lower hardware implementation complexity and only requires a small amount of look-up table and registers to achieve target probability distribution. Meanwhile, an optical tunable filter is used to generate single sideband discrete multitone (SSB-DMT) signals for 50-km standard single-mode fiber (SSMF) transmission. By using PS technology and SSB modulation scheme, we successfully real-time realize 11-GHz PS-64QAM SSB-DMT signals over 25/50-km SSMF transmission in band-limited IM-DD system, achieving a line rate of approximately 65.7 Gbit/s.

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在带宽受限的 IM-DD 系统中部署低复杂度分布匹配器的 60 Gb/s PS-64QAM SSB-DMT 实时收发器

在这项工作中，我们基于现场可编程门阵列（FPGA）为带宽受限的强度调制和直接检测（IM/DD）系统实时实现了低复杂度分布匹配器。对于概率整形（PS）的硬件实现而言，简单有效的分布匹配器是实现目标概率符号的关键。与传统的 PS 分布匹配器相比，我们提出的分布匹配器具有更低的硬件实现复杂度，只需要少量的查找表和寄存器就能实现目标概率分布。同时，利用光可调滤波器生成单边带离散多音（SSB-DMT）信号，用于 50 千米标准单模光纤（SSMF）传输。通过使用 PS 技术和 SSB 调制方案，我们成功地在带限 IM-DD 系统中实时实现了 11-GHz PS-64QAM SSB-DMT 信号在 25/50 千米 SSMF 上的传输，实现了约 65.7 Gbit/s 的线路速率。

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来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.