Chinese Optics Letters, Volume. 13, Issue 7, 071402(2015)

Highly efficient continuous-wave laser operation of laser diode-pumped Nd,Y:CaF2 crystals

Qian Zhang1,4, Liangbi Su1、*, Dapeng Jiang1, Fengkai Ma1,4, Zhipeng Qin2, Guoqiang Xie2, Jiangang Zheng3, Qinghua Deng3, Wanguo Zheng3, Liejia Qian2, and Jun Xu1、**
Author Affiliations
  • 1Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  • 3Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
  • 4University of Chinese Academy of Sciences, Beijing 100049, China
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    Figures & Tables(8)
    Room-temperature absorption spectra of (a) the 0.5% Nd:CaF2 crystal, which is 484–1000 nm and (b) the 0.5% Nd, 10% Y:CaF2 crystal, which is 767-835 nm.
    Room temperature emission spectra of the 0.5% Nd:CaF2 and 0.5% Nd, 10% Y:CaF2 crystals.
    (a) The room-temperature absorption spectra of the Nd3+I49/2→F45/2+H29/2 transition. (b) The absorption cross section at 790 and 797 nm for x (x=0.4%, 0.5%, 0.6%, 0.8%) Nd, 10% Y:CaF2 crystals.
    Room-temperature emission spectra of x(x=0.4%,0.5%,0.6%,0.8%) Nd, 10% Y:CaF2 crystals.
    Schematic of the CW laser setup: LD, laser diode; LS=L=500 mm; OC: output coupler with a transmission of 2%.
    Laser output power versus absorbed pump power curves for x(x=0.4%,0.5%,0.6%,0.8%) Nd, 10% Y:CaF2 crystals.
    • Table 1. Judd–Ofelt Parameters Ω2, Ω4, Ω6, Maximum Emission Peak (λem), FWHM (Δλ), Radiative Emission Lifetime (τrad), Fluorescence Lifetime (τexp), Fluorescence Quantum Efficiency (η) and Maximum Emission Cross Section (σem) for 0.5% Nd:CaF2 and 0.5% Nd, 10% Y:CaF2 Crystals

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      Table 1. Judd–Ofelt Parameters Ω2, Ω4, Ω6, Maximum Emission Peak (λem), FWHM (Δλ), Radiative Emission Lifetime (τrad), Fluorescence Lifetime (τexp), Fluorescence Quantum Efficiency (η) and Maximum Emission Cross Section (σem) for 0.5% Nd:CaF2 and 0.5% Nd, 10% Y:CaF2 Crystals

      CrystalΩ2(1020cm2)Ω4(1020cm2)Ω6(1020cm2)λem(nm)Δλ(nm)τrad(μs)τexp(μs)η(%)σem(1020cm2)
      0.5%Nd:CaF21.10823.63374.3470106233.21109117.991.652.28
      0.5%Nd,10%Y:CaF20.15853.23293.5231105428.03657.47361.2754.954.27
    • Table 2. Spectroscopic Properties of x(x=0.4%,0.5%,0.6%,0.8%) Nd, 10% Y:CaF2 Crystals

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      Table 2. Spectroscopic Properties of x(x=0.4%,0.5%,0.6%,0.8%) Nd, 10% Y:CaF2 Crystals

      CrystalΩ2(1020cm2)Ω4(1020cm2)Ω6(1020cm2)λem(nm)Δλ(nm)τrad(μs)τexp(μs)η(%)σem(1020cm2)
      0.4%Nd,10%Y:CaF20.60772.80323.0639105429.99795.09350.6246.193.36
      0.5%Nd,10%Y:CaF20.15853.23293.5231105428.51657.47361.2754.954.27
      0.6%Nd,10%Y:CaF20.41212.28064.0231105428.96693.22359.4051.853.99
      0.8%Nd,10%Y:CaF20.34772.95163.5851105429.98677.26320.9747.393.94
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    Qian Zhang, Liangbi Su, Dapeng Jiang, Fengkai Ma, Zhipeng Qin, Guoqiang Xie, Jiangang Zheng, Qinghua Deng, Wanguo Zheng, Liejia Qian, Jun Xu. Highly efficient continuous-wave laser operation of laser diode-pumped Nd,Y:CaF2 crystals[J]. Chinese Optics Letters, 2015, 13(7): 071402

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    Paper Information

    Category: Lasers and Laser Optics

    Received: Jan. 4, 2015

    Accepted: Apr. 29, 2015

    Published Online: Sep. 14, 2018

    The Author Email: Liangbi Su (su_lb@163.com), Jun Xu (xujun@mail.shcnc.ac.cn)

    DOI:10.3788/COL201513.071402

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