期刊介绍 期刊简介 收录情况 学术指标 期刊荣誉 期刊订阅 期刊在线 优先发表 当期目录 过刊浏览 专刊专栏 封面故事 虚拟专辑 双语文章 综述文章 院士访谈 点击排行 下载排行 引用排行 引文橱窗 编委会 编委会组成 编委会章程 编委会会议 投稿指南 投稿须知 投稿所需 稿件流程 伦理规范 数据共享 审稿服务 审稿须知 审稿流程 伦理规范 审稿专家 期刊介绍 期刊简介 收录情况 学术指标 期刊荣誉 期刊订阅 期刊在线 优先发表 当期目录 过刊浏览 专刊专栏 封面故事 虚拟专辑 双语文章 综述文章 院士访谈 点击排行 下载排行 引用排行 引文橱窗 编委会 编委会组成 编委会章程 编委会会议 投稿指南 投稿须知 投稿所需 稿件流程 伦理规范 数据共享 审稿服务 审稿须知 审稿流程 伦理规范 审稿专家 尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持! Design and optimization of weakly coupled multi-core fiber ZHAN Yi , WANG An , ZHANG Qing-long , WANG Yi-han 曲阜师范大学 工学院, 山东 日照276800 曲阜师范大学 工学院, 山东 日照276800 计量 文章访问数: 482 HTML全文浏览量: 192 PDF下载量: 65 被引次数: 0 出版历程 收稿日期: 2026-01-12 修回日期: 2026-02-10 录用日期: 2026-02-12 网络出版日期: 2026-03-19 收稿日期: 2026-01-12 修回日期: 2026-02-10 录用日期: 2026-02-12 网络出版日期: 2026-03-19 Design and optimization of weakly coupled multi-core fiber ZHANG Qing-long , College of Engineering, Qufu Normal University, Rizhao 276800, China College of Engineering, Qufu Normal University, Rizhao 276800, China ZHAN Yi (1969—), female, from Rizhao, Shandong Province. Ph.D., Professor, and Doctoral Supervisor. She received her Ph.D. degree in Materials Science and Engineering from Zhengzhou University in 2007. Her research focuses on optical fiber nonlinearities and ultrafast laser generation mechanisms of nanomaterials. Current interests include the mode-locking mechanism and device design of fiber lasers based on chalcogenide nanocrystals. E-mail: zhanyi@qfnu.edu.cn 摘要: 为实现光纤结构参数的全面、高效及多目标精确优化，并进一步提升光通信系统的传输容量，本文引入粒子群优化算法（PSO）代替传统经验设计或局部扫描方法，设计一种基于沟槽辅助结构的同质弱耦合七芯光纤。在建立一个包含色散、截止波长、有效模场面积和涂层损耗等约束条件的多目标适应度函数的基础上，利用粒子群优化算法进行全局搜索，在标准尺寸约束下精确确定光纤的最佳结构参数。仿真结果表明：在光纤纤芯间距为45 μm时，优化后的光纤在 1550 nm波长处实现了低于−90 dB/km的超低芯间串扰，有效解决了多芯光纤中串扰抑制与空间利用率之间的冲突，证明了粒子群算法在复杂光纤结构设计中的高效性与可靠性，为超大容量光纤通信系统的研发与制造提供了重要的理论依据和技术支持。 关键词: 多芯光纤 / 粒子群优化 / 沟槽辅助 / 芯间串扰 / 空分复用 Abstract: In order to achieve comprehensive, highly efficient, and multi-objective precise optimization of fiber structural parameters and further enhance the transmission capacity of optical communication systems, a homogeneous weakly coupled seven-core fiber based on trench-assisted structures is designed. Particle Swarm Optimization (PSO) is introduced to replace traditional empirical designs or local scanning methods. First, a multi-objective fitness function incorporating constraints such as dispersion, cutoff wavelength, effective mode field area, and coating loss is established. Then, the algorithm performs a global search to precisely determine the optimal structural parameters under standard dimensional constraints. Simulation results demonstrate that with a fiber core pitch of 45 μm, the optimized fiber achieves an ultra-low inter-core crosstalk of below −90 dB/km at a wavelength of 1550 nm. This design scheme not only effectively resolves the conflict between crosstalk suppression and spatial utilization in multi-core fibers but also proves the efficiency and reliability of the PSO algorithm in complex fiber structural design, providing an important theoretical basis and technical support for the research and manufacturing of ultra-large-capacity optical communication systems. Key words: multi-core fiber / particle swarm optimization / trench-assisted / inter-core crosstalk / space division multiplexing 为实现光纤结构参数的全面、高效及多目标精确优化，并进一步提升光通信系统的传输容量，本文引入粒子群优化算法（PSO）代替传统经验设计或局部扫描方法，设计一种基于沟槽辅助结构的同质弱耦合七芯光纤。在建立一个包含色散、截止波长、有效模场面积和涂层损耗等约束条件的多目标适应度函数的基础上，利用粒子群优化算法进行全局搜索，在标准尺寸约束下精确确定光纤的最佳结构参数。仿真结果表明：在光纤纤芯间距为45 μm时，优化后的光纤在 1550 nm波长处实现了低于−90 dB/km的超低芯间串扰，有效解决了多芯光纤中串扰抑制与空间利用率之间的冲突，证明了粒子群算法在复杂光纤结构设计中的高效性与可靠性，为超大容量光纤通信系统的研发与制造提供了重要的理论依据和技术支持。 In order to achieve comprehensive, highly efficient, and multi-objective precise optimization of fiber structural parameters and further enhance the transmission capacity of optical communication systems, a homogeneous weakly coupled seven-core fiber based on trench-assisted structures is designed. Particle Swarm Optimization (PSO) is introduced to replace traditional empirical designs or local scanning methods. First, a multi-objective fitness function incorporating constraints such as dispersion, cutoff wavelength, effective mode field area, and coating loss is established. Then, the algorithm performs a global search to precisely determine the optimal structural parameters under standard dimensional constraints. Simulation results demonstrate that with a fiber core pitch of 45 μm, the optimized fiber achieves an ultra-low inter-core crosstalk of below −90 dB/km at a wavelength of 1550 nm. This design scheme not only effectively resolves the conflict between crosstalk suppression and spatial utilization in multi-core fibers but also proves the efficiency and reliability of the PSO algorithm in complex fiber structural design, providing an important theoretical basis and technical support for the research and manufacturing of ultra-large-capacity optical communication systems. multi-core fiber / particle swarm optimization /

trench-assisted / inter-core crosstalk / space division multiplexing Figure 1. Schematic of the optimized trench-assisted fiber 下载: 全尺寸图片 幻灯片 Figure 2. Refractive index distribution 下载: 全尺寸图片 幻灯片 Figure 3. Algorithm flow chart 下载: 全尺寸图片 幻灯片 Figure 4. Super-modes and refractive index profile 下载: 全尺寸图片 幻灯片 Figure 5. Crosstalk-induced loss vs. power coupling coefficient at 100 km 下载: 全尺寸图片 幻灯片 Figure 6. Dispersion characteristics of minimum parameter combination optical fiber mode 下载: 全尺寸图片 幻灯片 Figure 7. Dispersion characteristics of maximum parameter combination optical fiber mode 下载: 全尺寸图片 幻灯片 Figure 8. Minimum parameter combination fiber dispersion value 下载: 全尺寸图片 幻灯片 Figure 9. Maximum parameter combination fiber dispersion value 下载: 全尺寸图片 幻灯片 Figure 10. Constraint combination 下载: 全尺寸图片 幻灯片 Figure 11. Optimized convergence curve. (Each red circle represents an iteration) 下载: 全尺寸图片 幻灯片 Figure 12. TA-MCF crosstalk vs core radius and pitch 下载: 全尺寸图片 幻灯片 Figure 13. TA-MCF crosstalk vs Δ 1 and Δ 2 下载: 全尺寸图片 幻灯片 Figure 14. TA-MCF crosstalk vs fiber length 下载: 全尺寸图片 幻灯片 Figure 15. Variations of crosstalk and dispersion under ±1% deviation of core radius 下载: 全尺寸图片 幻灯片 Table 1. Parameter combination Parameters Range Step Choices $ {a}_{1} $/μm 4~5 0.1 11 $ {w}_{{\mathrm{cl}}} $/μm 2.5~7.5 0.1 51 $ {w}_{{\mathrm{tr}}} $/μm 2.5~7.5 0.1 51 $ {\varDelta }_{1} $ 0.3%~0.6% 0.01% 31 $ {\varDelta }_{2} $ −0.7%~−0.35% 0.01% 36 $ \varLambda $/μm 30~45 0.1 151 下载: 导出CSV Table 2. Comparison with other 7-core fiber designs Reference Structure Type Core Pitch ($ \mu m $) Crosstalk (dB/km) $ {A}_{{\mathrm{eff}}}({\mu m}^{2}) $ Ref. [ 11 ] Trench-assisted 45 ~50 80 Ref. [ 13 ] Channel-assisted 35~45 −66(@1310 mm) - This work Optimized Trench 45 <-90 ~110 下载: 导出CSV Figure 1. Schematic of the optimized trench-assisted fiber Figure 2. Refractive index distribution Figure 3. Algorithm flow chart Figure 4. Super-modes and refractive index profile Figure 5. 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