中国物理B ›› 2023, Vol. 32 ›› Issue (5): 54206-054206.doi: 10.1088/1674-1056/ac9a3a

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High efficiency of Brillouin scattering behavior in single-mode Ge-As-Se-Te fibers at 2 μm

Yue Fu(付悦)1,2,3, Shi-Xun Dai(戴世勋)1,2,3,†, Lu-Lu Xu(徐路路)1,2,3, Yao-Jun Fang(方耀俊)4, Ying-Ying Wang(王莹莹)1,2,3, Kai Jiao(焦凯)1,2,3, and Xun-Si Wang(王训四)1,2,3   

  1. 1 Laboratory of Infrared Materials and Devices, The Research Institute of Advanced Technologies, Ningbo University, Ningbo 315211, China;
    2 Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province, Ningbo 315211, China;
    3 Engineering Research Center for Advanced Infrared Photoelectric Materials and Devices of Zhejiang Province, Ningbo 315211, China;
    4 Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
  • 收稿日期:2022-06-21 修回日期:2022-10-08 接受日期:2022-10-14 出版日期:2023-04-21 发布日期:2023-04-26
  • 通讯作者: Shi-Xun Dai E-mail:daishixun@nbu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61875094 and 62090064), the China Postdoctoral Science Foundation (Grant No. 2018M642386), and the K. C. Wong Magna Fund in Ningbo University.

High efficiency of Brillouin scattering behavior in single-mode Ge-As-Se-Te fibers at 2 μm

Yue Fu(付悦)1,2,3, Shi-Xun Dai(戴世勋)1,2,3,†, Lu-Lu Xu(徐路路)1,2,3, Yao-Jun Fang(方耀俊)4, Ying-Ying Wang(王莹莹)1,2,3, Kai Jiao(焦凯)1,2,3, and Xun-Si Wang(王训四)1,2,3   

  1. 1 Laboratory of Infrared Materials and Devices, The Research Institute of Advanced Technologies, Ningbo University, Ningbo 315211, China;
    2 Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province, Ningbo 315211, China;
    3 Engineering Research Center for Advanced Infrared Photoelectric Materials and Devices of Zhejiang Province, Ningbo 315211, China;
    4 Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
  • Received:2022-06-21 Revised:2022-10-08 Accepted:2022-10-14 Online:2023-04-21 Published:2023-04-26
  • Contact: Shi-Xun Dai E-mail:daishixun@nbu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61875094 and 62090064), the China Postdoctoral Science Foundation (Grant No. 2018M642386), and the K. C. Wong Magna Fund in Ningbo University.

摘要: The Brillouin characteristics of step-index Ge-As-Se-Te (GAST) fibers at 2 μm are designed and simulated on the basis of optical and acoustic properties. The refractive indexes of Ge$_{20}$As$_{20}$Se$_{45}$Te$_{15}$ glass and Ge$_{20}$As$_{20}$Se$_{43}$Te$_{17}$ glass serving as fiber core and cladding are 3.20 and 3.18 at 2 μm, and their acoustic velocities are 2200 m/s and 2300 m/s, respectively. Numerical results indicate that the stimulated Brillouin scattering (SBS) efficiency is 248 m$^{-1}\cdot$W$^{-1}$, and the Brillouin threshold power is 66 mW when the core diameter of the 2-m-long GAST fiber is 4 μm at 2-μm wavelength. The optic-acoustic coupling factor, the Brillouin frequency shift, and the Brillouin gain coefficient are 0.98, 7.02 GHz, and 3.81$\times10^{-9}$ m/W, respectively. The SBS effect of GAST fibers simulated for the first time provides a new promising approach to selecting gain medium based on 2-μm-wavelength fiber laser.

关键词: stimulated Brillouin scattering, chalcogenide fiber, nonlinear effect, optical-acoustic coupling

Abstract: The Brillouin characteristics of step-index Ge-As-Se-Te (GAST) fibers at 2 μm are designed and simulated on the basis of optical and acoustic properties. The refractive indexes of Ge$_{20}$As$_{20}$Se$_{45}$Te$_{15}$ glass and Ge$_{20}$As$_{20}$Se$_{43}$Te$_{17}$ glass serving as fiber core and cladding are 3.20 and 3.18 at 2 μm, and their acoustic velocities are 2200 m/s and 2300 m/s, respectively. Numerical results indicate that the stimulated Brillouin scattering (SBS) efficiency is 248 m$^{-1}\cdot$W$^{-1}$, and the Brillouin threshold power is 66 mW when the core diameter of the 2-m-long GAST fiber is 4 μm at 2-μm wavelength. The optic-acoustic coupling factor, the Brillouin frequency shift, and the Brillouin gain coefficient are 0.98, 7.02 GHz, and 3.81$\times10^{-9}$ m/W, respectively. The SBS effect of GAST fibers simulated for the first time provides a new promising approach to selecting gain medium based on 2-μm-wavelength fiber laser.

Key words: stimulated Brillouin scattering, chalcogenide fiber, nonlinear effect, optical-acoustic coupling

中图分类号:  (Fiber lasers)

  • 42.55.Wd
42.65.Es (Stimulated Brillouin and Rayleigh scattering) 42.81.-i (Fiber optics) 78.20.Pa (Photoacoustic effects)