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抗弯曲大模场面积少模光子晶体光纤

解国兴 谭芳 张云龙 高斌豪 崔顺发 穆伟 朱先和

解国兴, 谭芳, 张云龙, 等. 抗弯曲大模场面积少模光子晶体光纤[J]. 强激光与粒子束, 2023, 35: 121002. doi: 10.11884/HPLPB202335.230046
引用本文: 解国兴, 谭芳, 张云龙, 等. 抗弯曲大模场面积少模光子晶体光纤[J]. 强激光与粒子束, 2023, 35: 121002. doi: 10.11884/HPLPB202335.230046
Xie Guoxing, Tan Fang, Zhang Yunlong, et al. Bending resistant large mode field area few-mode photonic crystal fiber[J]. High Power Laser and Particle Beams, 2023, 35: 121002. doi: 10.11884/HPLPB202335.230046
Citation: Xie Guoxing, Tan Fang, Zhang Yunlong, et al. Bending resistant large mode field area few-mode photonic crystal fiber[J]. High Power Laser and Particle Beams, 2023, 35: 121002. doi: 10.11884/HPLPB202335.230046

抗弯曲大模场面积少模光子晶体光纤

doi: 10.11884/HPLPB202335.230046
基金项目: 中青年科技创新创业卓越人才项目(20210509044RQ)
详细信息
    作者简介:

    解国兴,xieguoxing97@163.com

    通讯作者:

    谭 芳,tanf280267@sina.com

  • 中图分类号: TN252

Bending resistant large mode field area few-mode photonic crystal fiber

  • 摘要: 为更好地解决少模光纤在传输中由于模式耦合过强而导致的信号串扰问题,对弱耦合光子晶体光纤中的线偏振(LP)模式以及矢量模的传输特性进行了研究,设计了一种可传输20种矢量模的双包层光子晶体光纤。通过有限元法模拟光纤参数对相邻LP模式间最小有效折射率差的影响,优化结构参数,使光纤支持稳定传输6种LP模式并满足弱耦合要求。最后分析了不同模式的有效模场面积、弯曲损耗。结果表明:各模式之间的最小有效折射率差达到1.12×10−4,表明模式间的串扰可忽略。基模有效模场面积达到了1040 μm2,且其相应的非线性系数低至1.07×10−10。此外,在弯曲半径为38 mm时,各模式弯曲损耗最大仅为5.65×10−8 dB/km。与主流的单模光纤及少模单包层相比,该结构具有大模场面积,低模间串扰及更强的抗弯曲能力,丰富了空分复用技术的开发思路。在大数据、虚拟现实、网络传输容量等新兴业务以及光纤传感方面提供了有益的参考方案。
  • 图  1  双包层光子晶体光纤结构

    Figure  1.  Double-clad photonic crystal fiber structure

    图  2  光子晶体光纤局部结构图

    Figure  2.  Local structure of photonic crystal fiber

    图  3  不同空气孔直径下光纤模场功率随光纤径向轴线分布图

    Figure  3.  Distribution of fiber mode field power along the radial axis of the fiber under different air hole diameters

    图  4  PCF的6种LP模式及其矢量模电场分布图

    Figure  4.  Six LP modes of PCF and their electric field distributions

    图  5  6个线偏振模式功率随纤芯半径径向轴线分布图

    Figure  5.  Power distribution of six linear polarization modes along radial axis of core radius

    图  6  λ=1.55 μm处有效折射率与折射率差随纤芯半径Rc变化

    Figure  6.  λ=1.55 μm, neff and ∆neff change with core radius Rc

    图  7  6种模式有效模场面积与非线性系数随纤芯半径Rc变化趋势图

    Figure  7.  Trend chart of effective mode field area and nonlinear coefficient of six modes changing with core radius Rc

    图  8  弯曲光纤6个线偏振模式模场图

    Figure  8.  Mode fields of six linearly polarized modes in bend fiber

    图  9  弯曲损耗随弯曲半径Rb的变化图

    Figure  9.  Variation of bending loss with bending radius Rb

    图  10  6种模式串扰损耗随波长变化趋势图

    Figure  10.  Crosstalk loss trend of six modes with wavelength

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出版历程
  • 收稿日期:  2023-03-07
  • 修回日期:  2023-10-28
  • 录用日期:  2023-10-28
  • 网络出版日期:  2023-11-06
  • 刊出日期:  2023-12-15

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