摘要
以K2W2O7作为助熔剂,Yb3+为敏化剂,采用泡生法生长掺8%(摩尔分数,下同)Tm3+和1%Ho3+的Tm,Ho:KYb(WO4)2(Tm,Ho:KYbW)晶体。采用X射线衍射(X-ray diffraction,XRD)分析了晶体的结构;测试了晶体的红外光谱和Raman光谱,并对出现的峰值进行了振动归属;测量了晶体的吸收光谱和荧光光谱,计算了相应的光谱参数。XRD分析表明:生长的晶体为单斜晶系的β型Tm,Ho:KYbW,C2/c空间群。在吸收光谱中,Yb3+在929、962 nm和1 000 nm处吸收峰最强,半峰宽为103 nm。荧光光谱中,在2 048 nm和1 626 nm附近有较强的发射峰,主峰2 048 nm处的发射线宽达132 nm,因此,Tm,Ho:KYbW晶体可作为可调谐激光增益介质。晶体的上转换荧光谱表明:在467 nm和782 nm处分别得到上转换蓝光和近红外光,确认了Tm3+和Ho3+之间存在交叉弛豫现象,并分析相应的上转换机制。
The potassium ytterbium tungstate [Tm,Ho：KYb（WO4）2,Tm,Ho：KYbW] crystal doped with 8%（in mole,the same below） Tm3＋ and 1% Ho3＋ was grown with K2W2O7 as a flux and Yb3＋ as a sensitizer by the Kyropoulos method.The structure of the crystals was analyzed via the X-ray diffractometer（XRD）.The infrared and Raman spectra of the crystals were measured,and the assignation of the vibrations of peak value was discussed.The absorption and fluorescence spectra of the Tm,Ho：KYbW crystal was analyzed and the corresponding spectral parameters were calculated.The XRD results show that the grown crystal belongs to a monoclinic β-Tm,Ho：KYbW,space group C2/c.The absorption peaks of Yb3＋ are located at 929,962 nm and 1 000 nm and the full width half maximum（FWHM） of the peak is 103 nm in absorption spectra.The fluorescence emission peaks of the Tm,Ho：KYbW crystal are located at 2 048 and 1 626 nm,and the emission FWHM of the chief peak at 2 048 nm is 132 nm,leading to an excellent gain medium for tunable laser.The upconversion fluorescence spectrum of the crystals indicate that the upconversion blue light of 467 nm and near-infrared light of 782 nm can be obtained.There exists the Tm3＋ and Ho3＋ cross relaxation.In addition,the corresponding upcon-version mechanism is also analyzed.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2011年第5期868-873,共6页
Journal of The Chinese Ceramic Society
基金
吉林省科技发展计划(吉科20090526)资助项目
关键词
铥
钬
钨酸鐿钾晶体
泡生法
吸收光谱
荧光光谱
激光晶体
thulium
holmium
potassium ytterbium tungstate crystal
Kyropoulos method
absorption spectrum
fluorescence spec-trum
laser crystal
