首页|Influence of Nd3+concentration on mid-infrared emission in PbF2 crystal co-doped with Ho3+and Nd3+ions
Influence of Nd3+concentration on mid-infrared emission in PbF2 crystal co-doped with Ho3+and Nd3+ions
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A promising series of HoyNdxPb(1-x-y)F2(x=0,0.01,0.02,0.03,0.04;y=0.02)crystals was grown by the Bridgman method.The influence of the Nd3+ions concentration on mid-infrared(～2.0,～2.9 and～3.9 μm)fluorescence emissions of Ho3+ions in the PbF2 crystal excited by 808 nm laser diode was investigated in this work.The energy transfer mechanism between Nd3+ions and Ho3+ions under different concen-trations of the Nd3+ions was systematically analyzed.The results show that the Nd3+ions have good sensitization and deactivation effect on the Ho3+ions to stimulate the mid-infrared fluorescence emissions.The experimental analysis proves that the sensitization efficiency of the Nd3+ions is relatively stable at around 93.45％with varying Nd3+-doping concentrations.Concentration dependence studies indicate that the concentration of the Nd3+ions has significant influence on mid-infrared emissions.When the doping concentration of the Nd3+ions is up to 2.0 at％,the intensity of～2.0,～2.9 and～3.9 μm emissions all reach the maximum.The output characteristics of a 3.9 μm laser are simulated,and it is found that with the increase of the Nd3+-doping concentration,the peak power,pulse width,and peak energy all meet the trend of first increasing and then decreasing,and Ho0.02Nd0.02Pb0.96F2 crystal displays the best performance.All the results show that the Nd3+/Ho3+co-doped PbF2 crystals might act as a useful optical medium for mid-infrared laser applications.
Crystal growthMid-infraredPbF2Rare earth ions
Yan Chen、Juncheng Tan、Peixiong Zhang、Weibi Zheng、Lin Li、Lianhan Zhang、Zhen Li、Yin Hang、Zhenqiang Chen
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Department of Optoelectronic Engineering,Jinan University,Guangzhou,510632,China
Guangdong Provincial Engineering Research Center of Crystal and Laser Technology,Guangzhou,510632,China
Research Center of Laser Crystal,Key Laboratory of High Power Laser Materials,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai,201800,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaKey-Area Research and Development Program of Guangdong Province
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