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Yb，Er，Eu：YAP中红外激光晶体的生长与光谱特性.pdf

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Yb，Er，Eu：YAP中红外激光晶体的生长与光谱特性:

Yb，Er，Eu：YAP中红外激光晶体的生长与光谱特性
Growth and spectroscopic characterizations of the mid-infrared Yb,Er, Eu： YAP laser crystal
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作　　者：谷长江[1,2] 陈祥迎[1] 孙敦陆[2] 罗建乔[2] 陈家康[2] 张会丽[2] 张庆礼[2] 殷绍唐[2]
GU Chang-Jiang, CHEN Xiang-ying, SUN Dun-lu, LUO Jian-qia, CHEN Jia-kang, ZHANG Hui-li, ZHANG Qing-li, YIN Shao-tang （1. School of Chemical Engineering, Hefei University of Technology, Hefei 2300009,China; 2. Key Laboratory of Photonic Devices and Materials of Anhui Provence, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031 ,China）
机构地区：[1]合肥工业大学化学工程学院,安徽合肥230009 [2]中国科学院安徽光学精密机械研究所,安徽省光子器件与材料重点实验室,安徽合肥230031
出　　处：《光电子．激光》 EI CSCD 2014年第25卷第3期 491-495页,共5页
Journal of Optoelectronics·laser
基　　金：国家自然科学基金（91122021,51272254,61205173,51172236和50932005）资助项目
摘　　要：用提拉法成功生长出3种不同掺Eu^3＋浓度的优质Yb，Er，Eu：YAP激光晶体，并对其光谱特性进行了研究。测量了晶体在320～3000nm波段内的吸收光谱，晶体在978nm附近有强的吸收峰和宽的吸收带。用波长为975nm的LD连续激光和OPO光参量脉冲激光激发分别获得了晶体的稳态和瞬态荧光光谱，采用单指数衰减拟合得到2．7～3．0μm激光上下能级寿命。与单掺Er：YAP晶体的光谱参数进行了比较，对Yb^3＋的敏化及Eu^3＋的退激活机理进行了分析。结果表明，Yb3＋和Eu^3＋可分别作为Er抖的敏化剂和退激活剂，增宽978nm附近的吸收带和降低激光下能级（4I13／2）与上能级（4I11／2）寿命的比值（4．1，3．1和2．7）；而在单掺Er：YAP晶体，下能级与上能级寿命的比值高达10．8，不利于激光性能的提高。因此，Yb，Er，Eu：YAP是一种更适合LD泵浦，有望实现低阈值、2．7～3．0μm高效率激光输出的新型激光晶体。
Abstract：We report the Yb,Er,Eu：YAP laser crystals with three different Eu^3＋ doping concentrations grown by the Czochralski method and investigate their spectroscopic characteristics. The absorption spectrum in the range of 320-3 000 nm is measured, and there is strong absorption and wide absorption band around 978 nm. The fluorescence spectrum and decay curves are measured by the excitation of 975 nm LD and OPO laser,respectively. The level lifetime is obtained with single exponential decay. These parameters are compared with those of the single doped Er： YAP crystal and the sensitization and deacti- vation mechanisms are analyzed. The results indicate that the Yb^3＋ and Eu^3＋ ions can act as sensitizer and deactivator for Er^3＋ ions, respectively, resulting in the widening of the absorption band at 978 nm and decreasing of the lifetime ratio （4. 1,3.1 and 2.7） between the lower laser level （4 I13/2 ） and upper laser level （4 I11/2）. However,the lifetime ratio of single doped Er.. YAP is very high and up to 10.8, which is disadvantageous to the improvement of the laser output properties. Therefore, the new Yb, Er, Ho.YAP laser crystal is more suitable to be pumped by 970-980 nm LD laser and the 2.7-3.0μm laser output could be realized easily with lower laser threshold and higher laser conversion efficiency.
关键词：激光晶体吸收系数光谱寿命
laser crystal ; absorption coefficient ; spectra ; lifetime ;

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Yb，Er，Eu：YAP中红外激光晶体的生长与光谱特性.pdf