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Chinese Journal of Lasers, Volume. 46, Issue 4, 0401003(2019)

Mid-Infrared Laser Performances of Er∶YAP Crystals Pumped by Xenon Lamp

Cong Quan1,2、*, Dunlu Sun1、*, Jianqiao Luo1, Huili Zhang1, Zhongqing Fang1,2, Xuyao Zhao1,2, Lunzhen Hu1,2, Maojie Cheng1, Qingli Zhang1, and Shaotang Yin1
Author Affiliations
  • 1 Key Laboratory of Photonic Devices and Materials of Anhui Province, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
  • 2 University of Science and Technology of China, Hefei, Anhui 230026, China
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    AbstractGet PDF(in Chinese)
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    Photograph of Er∶YAP single crystal rod and experimental setup with xenon lamp pumping

    Fig. 1. Photograph of Er∶YAP single crystal rod and experimental setup with xenon lamp pumping

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    Energy transfer diagram of Er3+ and absorption spectra of Er∶YAP crystal. (a) Energy transfer diagram; (b) absorption spectra at 320-1100 nm

    Fig. 2. Energy transfer diagram of Er3+ and absorption spectra of Er∶YAP crystal. (a) Energy transfer diagram; (b) absorption spectra at 320-1100 nm

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    Output energy of Er∶YAP crystal versus input energy under different repetition rates and transmissivity of output mirrors. (a) T=5%; (b) T=15%; (c) T=30%

    Fig. 3. Output energy of Er∶YAP crystal versus input energy under different repetition rates and transmissivity of output mirrors. (a) T=5%; (b) T=15%; (c) T=30%

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    Relative temperature distributions of single Er∶YAP crystal rod. (a) At crystal surface; (b) at axial cross section of crystal; (c) at radial cross section of crystal

    Fig. 4. Relative temperature distributions of single Er∶YAP crystal rod. (a) At crystal surface; (b) at axial cross section of crystal; (c) at radial cross section of crystal

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    Thermal focal length of Er∶YAP crystal rod and relative maximum temperature difference within crystal versus input power

    Fig. 5. Thermal focal length of Er∶YAP crystal rod and relative maximum temperature difference within crystal versus input power

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    Laser beam diameter versus propagation distance and spot image near waist

    Fig. 6. Laser beam diameter versus propagation distance and spot image near waist

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    Er∶YAP laser beam quality factor versus input power

    Fig. 7. Er∶YAP laser beam quality factor versus input power

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    Laser spectra of Er∶YAP crystal pumped by xenon lamps with different pump energies. (a) Win=17.34 J; (b) Win=27.74 J; (c) Win=34.56 J; (d) Win=65.34 J

    Fig. 8. Laser spectra of Er∶YAP crystal pumped by xenon lamps with different pump energies. (a) Win=17.34 J; (b) Win=27.74 J; (c) Win=34.56 J; (d) Win=65.34 J

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    • Table 1. Laser parameters of Er∶YAP crystal side-pumped by xenon lamp

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      Table 1. Laser parameters of Er∶YAP crystal side-pumped by xenon lamp

      Repetition rateCorresponding parameterT=5%T=15%T=30%
      Maximum output energy /mJ94711731068
      1 HzElectro-optical efficiency /%0.580.720.66
      Slope efficiency /%0.630.800.76
      Maximum output energy /mJ121212841030
      5 HzElectro-optical efficiency /%0.820.870.7
      Slope efficiency /%0.90.990.83
      Maximum output energy /mJ495439283
      10 HzElectro-optical efficiency /%0.690.610.4
      Slope efficiency /%0.840.810.58
      Maximum output energy /mJ104.259.217.3
      20 HzElectro-optical efficiency /%0.290.160.05
      Slope efficiency /%0.440.320.13

    • Table 2. Parameters for temperature distribution simulation

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      Table 2. Parameters for temperature distribution simulation

      ParameterValue
      Thermal conductivity (κ) /(W·m-1·K-1)7.5[16]
      Pump power (Pin) /W500
      Heat transfer coefficient between crystaland cooling water (h1) /(W·cm-2·K-1)1.8
      Heat transfer coefficient betweencrystal andair (h2) /(W·cm-2·K-1)0.005
      Temperature of cooling water (T) /K293.15
      Size of crystal /mmΦ4×100
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    Cong Quan, Dunlu Sun, Jianqiao Luo, Huili Zhang, Zhongqing Fang, Xuyao Zhao, Lunzhen Hu, Maojie Cheng, Qingli Zhang, Shaotang Yin. Mid-Infrared Laser Performances of Er∶YAP Crystals Pumped by Xenon Lamp[J]. Chinese Journal of Lasers, 2019, 46(4): 0401003

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    Paper Information

    Category: laser devices and laser physics

    Received: Dec. 7, 2018

    Accepted: Jan. 8, 2019

    Published Online: May. 9, 2019

    The Author Email:

    DOI:10.3788/CJL201946.0401003

    Topics

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