中国物理B ›› 2026, Vol. 35 ›› Issue (2): 24209-024209.doi: 10.1088/1674-1056/ae156e

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Tea polyphenol polymer film enables broadband optical modulation for hybrid mode-locked ultrafast fiber lasers

Wei Chen(陈伟)1, Kang Li(李康)1, Cheng Gao(高成)1, Qingping Hu(胡庆平)1,†, Zhengfan Li(黎征帆)2, Yi Xiong(熊祎)1, and Yunzhou Sun(孙运周)1,‡   

  1. 1 Research Group of Nonlinear Optical Science and Quantum Technology, Research Center of Nonlinear Science & Hubei Engineering Research Center for Wide Bandgap Semiconductor Materials and Devices, School of Microelectronics, Wuhan Textile University, Wuhan 430200, China;
    2 School of Textile Science and Engineering, Wuhan Textile University, Wuhan 430200, China
  • 收稿日期:2025-09-16 修回日期:2025-10-09 接受日期:2025-10-21 发布日期:2026-01-31
  • 通讯作者: Qingping Hu, Yunzhou Sun E-mail:hqp97@wtu.edu.cn;syz@wtu.edu.cn
  • 基金资助:
    This work was supported by the Opening Foundation of Hubei Key Laboratory for New Textile Materials and Applications Research (Grant No. FZXCL202410), the Key Project of Science and Technology Research Program of Hubei Provincial Department of Education, China (Grant No. D20231704), Wuhan Textile University (Grant No. 523058), and the Foundation of Wuhan Textile University (Grant No. K24058). The authors acknowledge the experimental support provided by the HX-L07 research group of the Institute of Physics, Chinese Academy of Sciences.

Tea polyphenol polymer film enables broadband optical modulation for hybrid mode-locked ultrafast fiber lasers

Wei Chen(陈伟)1, Kang Li(李康)1, Cheng Gao(高成)1, Qingping Hu(胡庆平)1,†, Zhengfan Li(黎征帆)2, Yi Xiong(熊祎)1, and Yunzhou Sun(孙运周)1,‡   

  1. 1 Research Group of Nonlinear Optical Science and Quantum Technology, Research Center of Nonlinear Science & Hubei Engineering Research Center for Wide Bandgap Semiconductor Materials and Devices, School of Microelectronics, Wuhan Textile University, Wuhan 430200, China;
    2 School of Textile Science and Engineering, Wuhan Textile University, Wuhan 430200, China
  • Received:2025-09-16 Revised:2025-10-09 Accepted:2025-10-21 Published:2026-01-31
  • Contact: Qingping Hu, Yunzhou Sun E-mail:hqp97@wtu.edu.cn;syz@wtu.edu.cn
  • Supported by:
    This work was supported by the Opening Foundation of Hubei Key Laboratory for New Textile Materials and Applications Research (Grant No. FZXCL202410), the Key Project of Science and Technology Research Program of Hubei Provincial Department of Education, China (Grant No. D20231704), Wuhan Textile University (Grant No. 523058), and the Foundation of Wuhan Textile University (Grant No. K24058). The authors acknowledge the experimental support provided by the HX-L07 research group of the Institute of Physics, Chinese Academy of Sciences.

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摘要： Materials exhibiting broadband nonlinear optical responses are critically important for ultrafast photonics applications, particularly as saturable absorbers (SAs) that facilitate broadband optical pulse generation. In this study, tea polyphenol-polyvinyl alcohol (TP-PVA) composite films are synthesized via a polymer embedding method and employed as SAs to initiate ultrafast pulse operation in fiber lasers. The TP-PVA SA film exhibits excellent broadband saturable absorption performance at wavelengths of 1.0 μm, 1.5 μm, and 2.0 μm, with modulation depths of 54.21 %, 41.41 %, and 51.16 %, respectively. Stable passively mode-locked pulses with pulse widths of 588 fs, 419 fs, and 743 fs are generated in Yb-, Er-, and Tm-doped fiber lasers, respectively. This work confirms the effective performance of TP-PVA as a broadband SA, and establishes a foundation for the integration of novel and sustainable materials within ultrafast photonic systems. The approach paves the way for developing compact broadband ultrafast laser systems operating in the near-infrared spectral region.

关键词: ultrafast fiber lasers, saturable absorbers, broadband modulators, natural dyes, tea polyphenol

Abstract: Materials exhibiting broadband nonlinear optical responses are critically important for ultrafast photonics applications, particularly as saturable absorbers (SAs) that facilitate broadband optical pulse generation. In this study, tea polyphenol-polyvinyl alcohol (TP-PVA) composite films are synthesized via a polymer embedding method and employed as SAs to initiate ultrafast pulse operation in fiber lasers. The TP-PVA SA film exhibits excellent broadband saturable absorption performance at wavelengths of 1.0 μm, 1.5 μm, and 2.0 μm, with modulation depths of 54.21 %, 41.41 %, and 51.16 %, respectively. Stable passively mode-locked pulses with pulse widths of 588 fs, 419 fs, and 743 fs are generated in Yb-, Er-, and Tm-doped fiber lasers, respectively. This work confirms the effective performance of TP-PVA as a broadband SA, and establishes a foundation for the integration of novel and sustainable materials within ultrafast photonic systems. The approach paves the way for developing compact broadband ultrafast laser systems operating in the near-infrared spectral region.

Key words: ultrafast fiber lasers, saturable absorbers, broadband modulators, natural dyes, tea polyphenol

中图分类号:  (Nonlinear optics)

  • 42.65.-k
42.55.Wd (Fiber lasers) 42.70.Jk (Polymers and organics) 42.60.Fc (Modulation, tuning, and mode locking)