Experimental Comparative Study on Gain and Noise Characteristics of All-Fiber Few-Mode Amplifier Under Different Pumping Methods

ZHANG Xin-yi; FANG Yi-hong; HUANG Xi-heng; ZENG Yan; QIN Yu-wen; XU Ou; LI Jiang-ping

doi:10.12263/DZXB.20230078

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Experimental Comparative Study on Gain and Noise Characteristics of All-Fiber Few-Mode Amplifier Under Different Pumping Methods

PAPERS | 更新时间：2025-12-11

- Experimental Comparative Study on Gain and Noise Characteristics of All-Fiber Few-Mode Amplifier Under Different Pumping Methods
- ACTA ELECTRONICA SINICA Vol. 52, Issue 6, Pages: 2074-2082(2024)
- 作者机构：
  
  1.广东工业大学物理与光电工程学院,广东广州 510006
  2.广东工业大学信息工程学院,广东广州 510006
  3.先进光子技术研究院,广东广州 510006
- 作者简介：
- 基金信息：
- DOI：10.12263/DZXB.20230078
  CLC： TN929.11;TN722
- Received：30 January 2023，
  
  Revised：2023-09-05，
  
  Published：25 June 2024
- 稿件说明：
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张心怡, 方翼鸿, 黄锡恒, 等. 基于不同泵浦方案的全光纤少模放大器放大特性对比研究[J]. 电子学报, 2024, 52(06): 2074-2082.

ZHANG Xin-yi, FANG Yi-hong, HUANG Xi-heng, et al. Experimental Comparative Study on Gain and Noise Characteristics of All-Fiber Few-Mode Amplifier Under Different Pumping Methods[J]. Acta Electronica Sinica, 2024, 52(06): 2074-2082.
张心怡, 方翼鸿, 黄锡恒, 等. 基于不同泵浦方案的全光纤少模放大器放大特性对比研究[J]. 电子学报, 2024, 52(06): 2074-2082. DOI：10.12263/DZXB.20230078

ZHANG Xin-yi, FANG Yi-hong, HUANG Xi-heng, et al. Experimental Comparative Study on Gain and Noise Characteristics of All-Fiber Few-Mode Amplifier Under Different Pumping Methods[J]. Acta Electronica Sinica, 2024, 52(06): 2074-2082. DOI：10.12263/DZXB.20230078

摘要

设计并构建全光纤型少模掺铒放大器，实验对比研究不同泵浦模式及方向对LP

、LP

11a

、LP

11b

这3个信号模式的增益特性影响.实验对泵浦功率、输入信号功率以及多波长情况下的放大器特性进行分析.结果表明，4种泵浦方案中，前向LP

泵浦情况下放大器有最佳性能，在整个C波段上信号增益超过20 dB、模式增益差低于0.9 dB，噪声系数小于9.6 dB；信号输入功率为-10 dBm/模式时，在1 550 nm处，3个信号模式的增益均超过20.8 dB、DMG低至0.3 dB、LP

信号光的噪声系数低于6.2 dB以及LP

信号光的噪声系数低于9.6 dB.4种泵浦方案下对比不同泵浦方向可得：前向泵浦放大器的噪声系数最小，但3种信号模式的增益也较小，而采用后向泵浦时，高阶信号模式增益增加，但噪声系数也会变大.对比泵浦模式可发现，相比于LP

泵浦，LP

泵浦能大幅提高LP

信号光的增益，对LP

信号光增益影响较小，从而可降低DMG值.

Abstract

An all-fiber few-mode erbium-doped amplifier was built to compare the effects of different pump modes and different pump directions on the gain characteristics of the three signal modes

11a

and LP

11b.

The experimental results show that the amplifier has the best performance under forward LP

pumping. The signal gain is more than 20 dB

the differential modal gain (DMG) is less than 0.9 dB and the noise figure is less than 9.6 dB in the whole C band. At a signal input power of -10 dBm/mode

the gain of all three signal modes at 1 550 nm exceeds 20.8 dB

the DMG is as low as 0.3 dB

the noise figure of LP

signaling light is lower than 6.2 dB

and the noise figure of LP

signaling light is lower than 9.6 dB. Comparing the different pumping directions under the four pumping schemes

it can be found that the noise figure of the forward-pumped amplifier is the smallest

but the gains of the three signal

modes are also smaller

while the gain of the higher-order signal modes is increased by using the backward-pumped one

but the noise figure will also become larger. Comparing the pumping modes

it can be found that compared with the LP

pumping

the LP

pumping can significantly increase the gain of the LP

signaling light

and has less effect on the gain of the LP

signaling light

which can reduce the DMG value.

关键词

Keywords

references

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Faculty of Physics and Optoelectronic Engineering， Guangdong University of Technology

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