文章摘要
引用本文:王伟男,李光伟,赵 斌.Nd:La0.02Lu0.98VO4晶体的生长与性能研究[J].福州大学学报(自然科学版),2018,46(4):568~573
Nd:La0.02Lu0.98VO4晶体的生长与性能研究
Growth and properties of Nd:La0.02Lu0.98VO4 crystal
  
DOI:10.7631/issn.1000-2243.17299
中文关键词: Nd:La0.02Lu0.98 VO4晶体  光谱  脉冲激光
英文关键词: Nd:La0.02Lu0.98 VO4 crystal  spectras  pulsed laser
基金项目:
作者单位
王伟男 福州大学石油化工学院福建 福州 350116 
李光伟 福州大学石油化工学院福建 福州 350116 
赵 斌 福州大学化学学院福建 福州 350116 
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中文摘要:
      利用提拉法生长Nd:La0.02Lu0.98 VO4单晶. 经测试,晶体的晶胞参数a=b=0.7037nm,c=0.6242nm;a向和c向的热膨胀系数分别为αa=4.3×10-6K-1αc=11.6×10-6 K-1. 室温下测试偏振吸收和荧光光谱,结果显示: 晶体在809nm处有较大的吸收线宽5.00nm(σ)和6.15nm(π),较大的吸收截面4.70×10-20cm2(σ)和10.47×10-20cm2(π). 在1065nm处有强荧光发射峰,半峰宽分别为 2.27nm(σ)和1.82nm(π),受激发射截面σe分别为6.5×10-19 cm2(σ)和13.8×10-19 cm2(π),荧光寿命为102.5μs. 利用未镀膜的晶片进行初步激光实验,获得1065nm连续和调Q激光输出. 在最高泵浦功率20W时,获得最高4.95W的连续输出,光-光转换效率为24.8%,斜效率27.9%;在脉冲重复频率为5kHz时,得到最高的峰值功率为61.99kW. 结果表明,Nd:La0.02Lu0.98 VO4晶体可能成为新的脉冲激光晶体.
英文摘要:
      The Nd:La0.02Lu0.98VO4 single crystal was grown by the Czochralski method. The cell parameters of the crystal are a=b=0.7037nm,c=0.6242nm,and thermal expansion coefficients along a and c axisare αa=4.3×10-6 K-1 and αc=11.6×10-6 K-1. Polarization absorption spectra and fluorescence spectra were measured at room temperature,which indicates that a large absorption line width at 809nm is 5.00nm (σ) and 6.15nm (π),with a large absorption cross section of 4.70×10-20 cm2(σ) and 10.47×10-20 cm2(π),respectively. The FWHM of strong fluorescence emission peaks at 1065nm is 2.27nm (σ) and 1.82nm (π). In correspondly,the stimulated emission cross section σe is 6.5×10-19 cm2 (σ) and 13.8×10-19 cm2 (π),as the fluorescence lifetime is 102.5μs. A CW and Q-switched laser output has been obtained at 1065 nm by uncoated crystal slices in preliminary laser experiments. The highest CW output power attained to be 4.95 W with the optical-optical conversion efficiency of 24.8% and the slope efficiency of 27.9%,when the maximum pump power is 20W. The maximum peak power is 61.99kW at the pulse repetition rate of 5kHz. Above all,the Nd:La0.02Lu0.98VO4 crystal promises to be a potential pulsed laser crystal.
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