• Laser & Optoelectronics Progress
  • Vol. 57, Issue 1, 011406 (2020)
Hanwei Zhang1、2、*, Xiaolin Wang2, Feng Tang1, Wenguang Liu2, Pengyu Liu1, Xiaojun Xu2, Yuzhi Xiao1, and Jinbao Chen2
Author Affiliations
  • 1Institute of Aerospace System Engineering, Shanghai Academy of Spaceflight Technology, Shanghai 201108, China
  • 2College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan 410073, China
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    DOI: 10.3788/LOP57.011406 Cite this Article Set citation alerts
    Hanwei Zhang, Xiaolin Wang, Feng Tang, Wenguang Liu, Pengyu Liu, Xiaojun Xu, Yuzhi Xiao, Jinbao Chen. Influence of γ Ray Induced Photo Darkening on Efficiency of Ytterbium-Doped Fiber Laser[J]. Laser & Optoelectronics Progress, 2020, 57(1): 011406 Copy Citation Text show less
    Schematic of fiber loss measurement by truncation method
    Fig. 1. Schematic of fiber loss measurement by truncation method
    Loss curves of 20 μm/400 μm Yb-doped fiber before and after radiation
    Fig. 2. Loss curves of 20 μm/400 μm Yb-doped fiber before and after radiation
    Variation in radiation induced loss of Yb-doped fiber with total dose of γ ray irradiation obtained by online measurement
    Fig. 3. Variation in radiation induced loss of Yb-doped fiber with total dose of γ ray irradiation obtained by online measurement
    Power distribution of Yb-doped fiber oscillator before and after γ-ray radiation with total dose of 30 krad
    Fig. 4. Power distribution of Yb-doped fiber oscillator before and after γ-ray radiation with total dose of 30 krad
    Output powers of fiber oscillator at different wavelengths pumped by laser at two wavelengths. (a) 976 nm; (b) 915 nm
    Fig. 5. Output powers of fiber oscillator at different wavelengths pumped by laser at two wavelengths. (a) 976 nm; (b) 915 nm
    Power distributions of oscillator and amplifier along fiber under same pump power
    Fig. 6. Power distributions of oscillator and amplifier along fiber under same pump power
    Temperature distributions of fiber cores of oscillator and amplifier under same pump power
    Fig. 7. Temperature distributions of fiber cores of oscillator and amplifier under same pump power
    ParameterValueUnitParameterValueUnit
    Core diameter20μmInner cladding diameter400μm
    Absorption crosssection @976 nm4.37×10-24m2Emission crosssection @976 nm4.42×10-24m2
    Absorption crosssection @1064 nm5.04×10-27m2Emission crosssection @1064 nm3.27×10-25m2
    Cladding absorptioncoefficient @976 nm1.5dB·m-1Cladding absorptioncoefficient @915 nm0.5dB·m-1
    Table 1. Partial parameters of tested fiber used in rate equation
    Hanwei Zhang, Xiaolin Wang, Feng Tang, Wenguang Liu, Pengyu Liu, Xiaojun Xu, Yuzhi Xiao, Jinbao Chen. Influence of γ Ray Induced Photo Darkening on Efficiency of Ytterbium-Doped Fiber Laser[J]. Laser & Optoelectronics Progress, 2020, 57(1): 011406
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