中国物理B ›› 2025, Vol. 34 ›› Issue (6): 64202-064202.doi: 10.1088/1674-1056/adc664

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High-efficiency Yb3+-doped fiber laser with highly optical nonlinear Bi4Br4-based saturable absorber

Mengyuan Liu(刘梦媛)1,†, Yechao Han(韩烨超)2,3,†, Qi Liu(刘齐)1,3, Hao Teng(滕浩)3, Xiwei Huang(黄玺玮)1, Xiaowei Xing(邢笑伟)1,3, Xiangyu Qiao(乔向宇)1, Guojing Hu(胡国静)3, Xiao Lin(林晓)2,‡, Haitao Yang(杨海涛)3,§, Zhiyi Wei(魏志义)3,5, and Wenjun Liu(刘文军)1,4,¶   

  1. 1 State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    2 School of Physical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China;
    3 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    4 Beijing Laser Creation Optoelectronics Technology Company Limited, Beijing 101400, China;
    5 Songshan Lake Materials Laboratory, Dongguan 523808, China
  • 收稿日期:2025-02-18 修回日期:2025-03-10 接受日期:2025-03-28 出版日期:2025-05-16 发布日期:2025-06-12
  • 通讯作者: Xiao Lin, Haitao Yang, Wenjun Liu E-mail:xlin@ucas.ac.cn;htyang@iphy.ac.cn;jungliu@bupt.edu.cn
  • 基金资助:
    Project supported by the Beijing Natural Science Foundation (Grant No. JQ21019), the National Key Research and Development Program of China (Grant Nos. 2022YFA1604200 and 2022YFA1204100), and the Fund from Beijing Municipal Commission of Science and Technology (Grant No. Z231100006623006).

High-efficiency Yb3+-doped fiber laser with highly optical nonlinear Bi4Br4-based saturable absorber

Mengyuan Liu(刘梦媛)1,†, Yechao Han(韩烨超)2,3,†, Qi Liu(刘齐)1,3, Hao Teng(滕浩)3, Xiwei Huang(黄玺玮)1, Xiaowei Xing(邢笑伟)1,3, Xiangyu Qiao(乔向宇)1, Guojing Hu(胡国静)3, Xiao Lin(林晓)2,‡, Haitao Yang(杨海涛)3,§, Zhiyi Wei(魏志义)3,5, and Wenjun Liu(刘文军)1,4,¶   

  1. 1 State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    2 School of Physical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China;
    3 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    4 Beijing Laser Creation Optoelectronics Technology Company Limited, Beijing 101400, China;
    5 Songshan Lake Materials Laboratory, Dongguan 523808, China
  • Received:2025-02-18 Revised:2025-03-10 Accepted:2025-03-28 Online:2025-05-16 Published:2025-06-12
  • Contact: Xiao Lin, Haitao Yang, Wenjun Liu E-mail:xlin@ucas.ac.cn;htyang@iphy.ac.cn;jungliu@bupt.edu.cn
  • Supported by:
    Project supported by the Beijing Natural Science Foundation (Grant No. JQ21019), the National Key Research and Development Program of China (Grant Nos. 2022YFA1604200 and 2022YFA1204100), and the Fund from Beijing Municipal Commission of Science and Technology (Grant No. Z231100006623006).

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摘要： Recently, Bi$_{4}$Br$_{4}$ is proved to be a member of topological insulators and is expected to be a promising candidate for ultrafast photonic device. However, experimental studies on the nonlinear optical properties of Bi$_{4}$Br$_{4}$ are limited, and its broadband absorption capabilities have not been validated. This study presents the first preparation of Bi$_{4}$Br$_{4}$ samples using the chemical vapor transport method, resulting in a saturable absorber (SA) with a high modulation depth (46.23%) and low non-saturable loss (6.5%). The optical nonlinearity ranks among the best in similar studies. Additionally, this work applies Bi$_{4}$Br$_{4}$-SA for the first time in 1-μm fiber laser, developing a ring-cavity mode-locked fiber laser with a central wavelength of 1029.79 nm, a pulse duration of 442 fs, and a maximum output power of 90.83 mW. And a linear-cavity mode-locked fiber laser with a central wavelength of 1031.24 nm, a pulse duration of 511 fs, and a maximum output power of 92.81 mW is constructed. It is worth noting that the optical-to-optical conversion efficiency has reached about 11.54% and 33.58%. This study verifies Bi$_{4}$Br$_{4}$-SA's modulation effectiveness for 1-μm pulse lasers and provides a powerful reference for the design of high-efficiency fiber lasers.

关键词: fiber laser, topological insulators, saturable absorber

Abstract: Recently, Bi$_{4}$Br$_{4}$ is proved to be a member of topological insulators and is expected to be a promising candidate for ultrafast photonic device. However, experimental studies on the nonlinear optical properties of Bi$_{4}$Br$_{4}$ are limited, and its broadband absorption capabilities have not been validated. This study presents the first preparation of Bi$_{4}$Br$_{4}$ samples using the chemical vapor transport method, resulting in a saturable absorber (SA) with a high modulation depth (46.23%) and low non-saturable loss (6.5%). The optical nonlinearity ranks among the best in similar studies. Additionally, this work applies Bi$_{4}$Br$_{4}$-SA for the first time in 1-μm fiber laser, developing a ring-cavity mode-locked fiber laser with a central wavelength of 1029.79 nm, a pulse duration of 442 fs, and a maximum output power of 90.83 mW. And a linear-cavity mode-locked fiber laser with a central wavelength of 1031.24 nm, a pulse duration of 511 fs, and a maximum output power of 92.81 mW is constructed. It is worth noting that the optical-to-optical conversion efficiency has reached about 11.54% and 33.58%. This study verifies Bi$_{4}$Br$_{4}$-SA's modulation effectiveness for 1-μm pulse lasers and provides a powerful reference for the design of high-efficiency fiber lasers.

Key words: fiber laser, topological insulators, saturable absorber

中图分类号:  (Fiber lasers)

  • 42.55.Wd
42.70.-a (Optical materials) 42.60.-v (Laser optical systems: design and operation)