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Chinese Journal of Lasers, Volume. 49, Issue 7, 0706002(2022)

Homemade 20 kW Yb-Doped Double-Cladding Fiber for Tandem Pumping

Yongqing Yi1、*, Jun Liu1, Yize Shen1, Fengyun Li2, Zhihui Han1, Peng Yang1, Lu Pang1, Honghuan Lin2, and Jianjun Wang2
Author Affiliations
  • 1The 46th Research Institute, China Electronics Technology Group Corporation, Tianjin 300220, China
  • 2Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (10)
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    References (9)
    Cited By (3)
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    Figures & Tables(10)
    Refractive index profile of fiber before improvement

    Fig. 1. Refractive index profile of fiber before improvement

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    Doped element distributions in fiber core before process improvement. (a) Si; (b) Yb; (c) Al; (d) P

    Fig. 2. Doped element distributions in fiber core before process improvement. (a) Si; (b) Yb; (c) Al; (d) P

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    Refractive index profile of fiber after improvement

    Fig. 3. Refractive index profile of fiber after improvement

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    Doped element distributions in fiber core after improvement.( a) Si; (b) Yb; (c) Al; (d) P

    Fig. 4. Doped element distributions in fiber core after improvement.( a) Si; (b) Yb; (c) Al; (d) P

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    End face of Yb-doped double-cladding fiber

    Fig. 5. End face of Yb-doped double-cladding fiber

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    Absorption coefficient of Yb-doped double-cladding fiber

    Fig. 6. Absorption coefficient of Yb-doped double-cladding fiber

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    Schematic of fiber laser system [9]

    Fig. 7. Schematic of fiber laser system [9]

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    Output power versus pump power [9]

    Fig. 8. Output power versus pump power [9]

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    Laser spectrum at maximum output power [9]

    Fig. 9. Laser spectrum at maximum output power [9]

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    • Table 1. Parameters for Yb-doped double-cladding fiber

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      Table 1. Parameters for Yb-doped double-cladding fiber

      ParameterUnitContent
      Core diameterμm47.3
      Cladding diameter(side to side)μm399.6
      Cladding shape-Regular octagon
      Cladding absorptivity @1018 nmdB/m0.72
      Core attenuation coefficient @1200 nmdB/km10.8
      Cladding attenuation coefficient @1095 nmdB/km2.28
      Numerical aperture of core-0.0687
      Numerical aperture of cladding-0.468
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    Yongqing Yi, Jun Liu, Yize Shen, Fengyun Li, Zhihui Han, Peng Yang, Lu Pang, Honghuan Lin, Jianjun Wang. Homemade 20 kW Yb-Doped Double-Cladding Fiber for Tandem Pumping[J]. Chinese Journal of Lasers, 2022, 49(7): 0706002

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    Paper Information

    Category: fiber optics and optical communications

    Received: Jul. 15, 2021

    Accepted: Sep. 6, 2021

    Published Online: Mar. 2, 2022

    The Author Email: Yongqing Yi (yiyongq@126.com)

    DOI:10.3788/CJL202249.0706002

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology