Limitation of Group Refractive Index in An Optical Fiber at The Room Temperature

QIU Wei; GAO Bo; LIU Jian-jun; WANG Yu-da; LYU Pin; JIANG Qiu-li

doi:10.3788/fgxb20173803.0380

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Limitation of Group Refractive Index in An Optical Fiber at The Room Temperature

更新时间：2020-08-12

- Limitation of Group Refractive Index in An Optical Fiber at The Room Temperature
- Chinese Journal of Luminescence Vol. 38, Issue 3, Pages: 380-386(2017)
- 作者机构：
  
  1. 辽宁大学物理学院,辽宁沈阳,110036
  2. 中国科学院低温工程学重点实验室(理化技术研究所), 北京 100190
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(51627809);Cultivation Sp
- DOI：10.3788/fgxb20173803.0380
  CLC： O436.1
- Received：26 September 2016，
  
  Revised：27 November 2016，
  
  Published：05 March 2017
- 稿件说明：
移动端阅览
邱巍, 高波, 刘健君等. 光纤中慢光群折射率限定特性研究[J]. 发光学报, 2017,38(3): 380-386

QIU Wei, GAO Bo, LIU Jian-jun etc. Limitation of Group Refractive Index in An Optical Fiber at The Room Temperature[J]. Chinese Journal of Luminescence, 2017,38(3): 380-386
邱巍, 高波, 刘健君等. 光纤中慢光群折射率限定特性研究[J]. 发光学报, 2017,38(3): 380-386 DOI： 10.3788/fgxb20173803.0380.

QIU Wei, GAO Bo, LIU Jian-jun etc. Limitation of Group Refractive Index in An Optical Fiber at The Room Temperature[J]. Chinese Journal of Luminescence, 2017,38(3): 380-386 DOI： 10.3788/fgxb20173803.0380.

摘要

粒子在基态和亚稳态之间的振荡会导致探测光吸收的降低，而探测光束在很窄的频率范围内吸收的降低，会使介质的感生折射率在同样范围内迅速变化，从而改变群折射率

n（）+

。本文利用光纤慢光理论，对不同条件下的群折射率限定和群速度的变化特性展开讨论。群折射率随光纤长度的增加而降低，不同离子浓度的掺铒光纤中慢光的感生群折射率均随调制频率的增加而降低，同时在不同的调制频率条件下，群折射率随入射信号光强度的增大均有一个饱和的过程。

Abstract

The electron population oscillating between the ground and metastable level in the beat frequency between the pump and probe beam can result in the reduced absorption of the probe wave. The probe wave experiences the reduction of absorption in a narrow frequency band

which corresponds to rapid changes of the refractive index. According to the equation of

n()+

the group refractive index will increase. Utilizing the theory of slow light

the limitation of group refractive index in different environments and the change of group velocity were discussed. It is found that the group refractive index decreases with the increasing of the fiber length. The group refractive indices in the fibers with different Er

concentration decrease with the increasing of the modulation frequency

and the group refractive index has a saturation process with the increasing of the signal power under different modulation frequency.

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references

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