Optical Properties of Few-Mode Fiber with Non-Uniform Refractive Index

LI Hong-ye; WAN Hong-dan; WANG Du-yi; OU Qi; WANG Zi-kang

doi:10.13756/j.gtxyj.2016.05.014

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Optical Properties of Few-Mode Fiber with Non-Uniform Refractive Index

- Optical Properties of Few-Mode Fiber with Non-Uniform Refractive Index
- Study on Optical communication Issue 5, Pages: 46-49(2016)
- 作者机构：
  
  南京邮电大学
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2016.05.014
  CLC： TN253
- Published：2016，
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[1]李宏业,万洪丹,王杜毅,欧琦,王子康.非均匀折射率分布少模光纤光学特性研究[J].光通信研究,2016(05):46-49.

LI Hong-ye, WAN Hong-dan, WANG Du-yi, et al. Optical Properties of Few-Mode Fiber with Non-Uniform Refractive Index. [J]. (5):46-49(2016)
[1]李宏业,万洪丹,王杜毅,欧琦,王子康.非均匀折射率分布少模光纤光学特性研究[J].光通信研究,2016(05):46-49. DOI： 10.13756/j.gtxyj.2016.05.014.

LI Hong-ye, WAN Hong-dan, WANG Du-yi, et al. Optical Properties of Few-Mode Fiber with Non-Uniform Refractive Index. [J]. (5):46-49(2016) DOI： 10.13756/j.gtxyj.2016.05.014.

摘要

以实现柱矢量光横向选模为目标

研究了非均匀折射率分布的少模光纤的光学特性。利用有限元法分析了U型折射率分布和弯曲少模光纤的模场特性:前者结合1 550nm泵浦光可支持LP11模式并抑制LP01模式;后者包括二模光纤和四模光纤

当二者弯曲半径分别为4和2cm时

仅支持LP01和LP11模式。结合理论和实验研究了四模和二模FBG（光纤布拉格光栅）

对于二模FBG

当透射波长位于1 549.79nm附近时

可获得呈两瓣分布的LP11模式;对于四模FBG

其反射谱峰值波长个数随尾纤弯曲半径的减小而减少。相关结果对于柱矢量光的产生和应用具有重要的理论和实践意义。

Abstract

This paper studies optical properties of few-mode fibers with non-uniform refractive index profile

namely:the Ushape refractive index few-mode fiber and the bending two-mode and four-mode fiber.Finite element method is used to analyze the modal profile of these few-mode fibers.The U-shape refractive index few-mode fiber can support LP11 mode and suppress LP01 mode with a proper pump at 1 550 nm.The two-mode fiber and four-mode fiber can only support LP01 and LP11mode with a bending radius of 4cm and 2cm

respectively.Two-mode and four-mode Fiber Bragg Gratings（FBG）are also studied theoretically and experimentally.As to the two-mode FBG

LP11 mode distribution with a two-lobe shape is measured experimentally near a transmission wavelength of 1 549.79 nm.As to the four-mode FBG

the number of reflection peak wavelength is decreased with a lower bending radius.

关键词

少模光纤柱矢量光非均匀折射率少模光纤布拉格光栅透射谱

Keywords

few-mode fibercylindrical vector beamnon-uniform refractive indexfew-mode fiber Bragg gratingtransmission spectrum

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