Investigation on the randomly-coupled unit grouping multi-core fibers with different unit arrangement

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2024-08-20 DOI:10.1016/j.yofte.2024.103926

Ruichun Wang , Zhilu Luo , Jiajing Tu , Lei Shen , Jie Luo , Gaorong Han , Weiping Liu

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引用次数: 0

Abstract

Randomly-coupled unit grouping multi-core fiber (RC-UG-MCF) is a new fiber structure that combines weakly and strongly coupled multi-core fiber technologies. Compared to the weakly-coupled MCF with a large cladding size, the RC-UG-MCF can shrink the cladding size by grouping the cores. On the other hand, the RC-UG-MCF only maintains a few cores in the strongly-coupled condition, which can reduce the multiple-input multiple- output digital signal processing (MIMO-DSP) complexity compared to the coupled MCFs with full MIMO-DSP for all the cores. In this paper, we intro- duce three types of randomly-coupled unit grouping 12-core fiber, which are randomly-coupled 2-core unit grouping MCF (RC-2CUG-MCF), RC-3CUG- MCF and RC-4CUG-MCF. Subsequently, we compare these three RC-UG- MCFs in terms of group delay spread, inter-unit crosstalk (XT), and cladding size. To achieve an inter-unit XT of −40 dB/100 km, RC-3CUG-MCF can provide a solution to maintain MIMO-DSP scale at the level of 6 × 6 with 180-µm cladding radius. However, the RC-2CUG-MCF has worse inter-unit XT, and the RC-4CUG-MCF has larger MIMO complexity. Based on the analysis, there is a trade-off relationship between the MIMO-DSP scale and the fiber cladding size, assuming that the target inter-unit XT is fixed.

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不同单元排列的随机耦合单元分组多芯光纤研究

随机耦合单元分组多芯光纤（RC-UG-MCF）是一种结合了弱耦合和强耦合多芯光纤技术的新型光纤结构。与包层尺寸较大的弱耦合 MCF 相比，RC-UG-MCF 可以通过纤芯分组来缩小包层尺寸。另一方面，在强耦合条件下，RC-UG-MCF 只保留少数几个核心，这与所有核心都具有完整 MIMO-DSP 的耦合 MCF 相比，可以降低多输入多输出数字信号处理（MIMO-DSP）的复杂性。本文介绍了三种随机耦合单元分组 12 芯光纤，即随机耦合 2 芯单元分组 MCF（RC-2CUG-MCF）、RC-3CUG- MCF 和 RC-4CUG-MCF。随后，我们对这三种 RC-UG- MCF 的群延迟扩散、单元间串扰 (XT) 和包层尺寸进行了比较。为了实现-40 dB/100 km的单元间串扰（XT），RC-3CUG-MCF 可以提供一种解决方案，在包层半径为 180µm 的情况下将 MIMO-DSP 规模保持在 6 × 6 的水平。然而，RC-2CUG-MCF 的单元间 XT 较差，RC-4CUG-MCF 的 MIMO 复杂性较大。根据分析，假设目标单元间 XT 固定不变，MIMO-DSP 规模与光纤包层尺寸之间存在权衡关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.