Analysis and calculation of Brillouin scattering angle and frequency shift in multimode optical fibers

Li Yongqian; Zhao Xu; Zhao Lijuan

doi:10.13756/j.gtxyj.2014.06.011

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Analysis and calculation of Brillouin scattering angle and frequency shift in multimode optical fibers

- Analysis and calculation of Brillouin scattering angle and frequency shift in multimode optical fibers
- Study on Optical communication Issue 6, Pages: 38-41(2014)
- 作者机构：
  
  华北电力大学电子与通信工程系
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2014.06.011
  CLC： TN253
- Published：2014，
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[1]李永倩,赵旭,赵丽娟.多模光纤布里渊散射角及频移的分析与计算[J].光通信研究,2014(06):38-41.

Li Yongqian, Zhao Xu, Zhao Lijuan. Analysis and calculation of Brillouin scattering angle and frequency shift in multimode optical fibers. [J]. (6):38-41(2014)
[1]李永倩,赵旭,赵丽娟.多模光纤布里渊散射角及频移的分析与计算[J].光通信研究,2014(06):38-41. DOI： 10.13756/j.gtxyj.2014.06.011.

Li Yongqian, Zhao Xu, Zhao Lijuan. Analysis and calculation of Brillouin scattering angle and frequency shift in multimode optical fibers. [J]. (6):38-41(2014) DOI： 10.13756/j.gtxyj.2014.06.011.

摘要

为了确定多模光纤布里渊频移的取值范围

进而评价多模光纤布里渊分布式传感系统的性能

从多模光纤的结构出发

根据射线光学理论分析了多模光纤中的布里渊散射过程

提出了确定布里渊散射角取值范围的方法

得到了阶跃型和渐变型多模光纤布里渊散射角的取值范围为两倍的全反射临界角到π

进而得到布里渊频移的变化范围为10.978

1.083GHz

该结论为多模光纤布里渊分布式传感系统的设计和优化提供了理论依据。

Abstract

To determine the value range of Brillouin shift in multimode fibers and evaluate the performances of Brillouin scattering-based distributed sensing system

this paper first describes the fiber structures and analyzes the Brillouin scattering process in them on the basis of ray optics theory.Then it proposes a method for determining the value range of Brillouin scattering angle.In this method

it determines that the Brillouin scattering angle in step-index and graded-index multimode fibers is in the range of twice of the critical angle of total reflection toπ

and that the Brillouin shift varies in the range of 10.978

1.083 GHz.This conclusion provides a forceful theoretical basis for the design and optimization of the distributed Brillouin sensing system for multimode fibers.

关键词

分布式传感布里渊散射多模光纤散射角布里渊频移

Keywords

distributed sensingBrillouin scatteringmultimode fiberscattering angleBrillouin shift

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