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Journal of Applied Sciences >

2025 , Vol. 43 >Issue 6: 909 - 921

DOI: https://doi.org/10.3969/j.issn.0255-8297.2025.06.002

Communication Engineering

Influence of Pump Configuration on U-Band Amplification Performance of High Germanium Bismuth-Doped Silica Fiber

  • TIAN Jinmin ,
  • GUO Mengting ,
  • LI Xin ,
  • WANG Fan ,
  • CHEN Ciying ,
  • ZHANG Lei ,
  • WANG Meng ,
  • YU Chunlei ,
  • HU Lili
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  • 1. School of Physical Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China;
    2. Advanced Laser and Optoelectronic Functional Materials Department, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
    3. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
    4. Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, Zhejiang, China

Received date: 2024-12-21

  Online published: 2025-12-19

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Abstract

Based on a 100 m long home-fabricated bismuth-doped silica fiber with high germanium content, the U-band broadband amplification of 1 650~1 750 nm was achieved with a maximum gain of 28.34 dB at 1 720 nm. At the same time, the influence of different pump schemes on the amplification performance of bismuth-doped fiber amplifier was systematically studied through both experiments and numerical simulations. Results show that bidirectional pumping is more conducive for achieving high gain and low noise figure at low pump power. Furthermore, the gain is greatly affected by the input signal power under forward pumping, followed by bidirectional pumping, and is most stable under backward pumping. This study can provide a reference for the design optimization and application of U-band bismuth-doped fiber amplifiers.

Key words： bismuth-doped fiber; fiber amplifier; U-band amplification

Cite this article

TIAN Jinmin , GUO Mengting , LI Xin , WANG Fan , CHEN Ciying , ZHANG Lei , WANG Meng , YU Chunlei , HU Lili . Influence of Pump Configuration on U-Band Amplification Performance of High Germanium Bismuth-Doped Silica Fiber[J]. Journal of Applied Sciences, 2025 , 43(6) : 909 -921 . DOI: 10.3969/j.issn.0255-8297.2025.06.002

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