A Type of Photonic Crystal Fiber with 42 OAM Modes

YANG Hong-hong; CHEN He-ming; BAI Xiu-li

doi:10.13756/j.gtxyj.2018.02.010

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A Type of Photonic Crystal Fiber with 42 OAM Modes

- A Type of Photonic Crystal Fiber with 42 OAM Modes
- Study on Optical communication Issue 2, Pages: 32-35(2018)
- 作者机构：
  
  1. 南京邮电大学光电工程学院
  2. 南京邮电大学贝尔英才学院
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2018.02.010
  CLC： TN253
- Published：2018，
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[1]杨红红,陈鹤鸣,白秀丽.一种可传输42个OAM模的光子晶体光纤[J].光通信研究,2018(02):32-35.

YANG Hong-hong, CHEN He-ming, BAI Xiu-li. A Type of Photonic Crystal Fiber with 42 OAM Modes. [J]. (2):32-35(2018)
[1]杨红红,陈鹤鸣,白秀丽.一种可传输42个OAM模的光子晶体光纤[J].光通信研究,2018(02):32-35. DOI： 10.13756/j.gtxyj.2018.02.010.

YANG Hong-hong, CHEN He-ming, BAI Xiu-li. A Type of Photonic Crystal Fiber with 42 OAM Modes. [J]. (2):32-35(2018) DOI： 10.13756/j.gtxyj.2018.02.010.

摘要

文章提出一种可以传输42个轨道角动量（OAM）模式的环形光子晶体光纤

该光纤由中心空气孔、环形高折射率层以及包层构成

其中包层是由方形空气孔与圆形空气孔共同组成。利用有限元法对其进行仿真分析

仿真结果表明

这种结构在1.55μm处可以将简并模间的有效折射率差提高到3.45×10-3

从而大大减小模式间的耦合

所有模式的色散值均较小

例如HE2

1模式的色散只有53.29ps/（nm·km）。此外

光能量主要集中在环形高折射率区域内

且环形区域大小可灵活设计。

Abstract

A new type of ring photonic crystal fiber has proposed which can support 42 Orbital Angular Momentum（OAM）annular modes.The optical fiber is composed of a central air hole

an annular high refractive index layer and a cladding layer

which includes square air holes and circular air holes.We simulate and analyze the mode properties and propagation effects of OAM by finite-element analysis.The simulation results indicate that the mode index difference can be maintained above 3.45 ×10-3.Therefore

it can effectively reduce the modal coupling in the fiber with small dispersion values for all modes（the dispersion of HE2

1 is only 53.29 ps/（nm·km））.In addition

the optical energy is mainly concentrated in the high refractive index region

and the annular region does not need additional doping to obtain high refractive index.

关键词

轨道角动量光子晶体光纤有效折射率色散

Keywords

orbital angular momentumphotonic crystal fiberseffective refractive indexdispersion

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Key Laboratory of Optical Communications Science and Technology in Shandong Province

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