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ErYb:氟氧化物玻璃陶瓷的上转换发光特征饱和现象的综合分析
Comprehensive Analysis of Up-Conversion Luminescence SaturationPhenomena of ErYb:Oxyfluoride Vitroceramics
【摘要】 研究了Er3+和Yb3+双掺的氟氧化物玻璃陶瓷在966nm激光激发下的上转换发光的饱和现象。详细的分析发现了它存在一种能量扩展导致的“特征饱和现象”,也就是说上转换发光强度I随激光功率P而改变的双对数曲线的斜率随着激光光斑的增大而明显增大至正常的多光子关系。还发现布居耗空所导致的“典型饱和现象”也有较大的影响,它导致了logI-logP曲线会随着激光功率的增加而逐渐弯曲,而激光功率的减小会导致“典型饱和现象”也减小甚至完全消失。
【Abstract】 The saturation phenomenon of the up-conversion luminescence of erbium ytterbium co-doped oxyfluoride vitroceramics (ErYb:FOV), when excited by a 966 nm diode-laser, was investigated comprehensively in the present article. A new kind of ~“characteristic saturation phenomenon”, which results from energy diffusion, was found, i.e. the slope of logI-logP curve, the ~double logarithmic variation of up-conversion luminescence intensity I upon laser power P, is increased evidently toward regular ~multi-photon relation with the increase of laser facula. The “typical saturation phenomenon” resulting from ground state population’s exhaustion has huge influence as well, which causes these logI-logP curves to bend gradually with the increase in laser power. ~Interestingly , this “typical saturation phenomenon” can be decreased obviously and even vanishes when the pumping laser power ~density is decreased enough.
【Key words】 Up-conversion sensitization; ErYb:oxyfluoride vitroceramics; Energy diffusion; Saturation phenomenon; Cluster effect;
- 【文献出处】 光谱学与光谱分析 ,Spectroscopy and Spectral Analysis , 编辑部邮箱 ,2005年02期
- 【分类号】O432
- 【被引频次】14
- 【下载频次】216