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Yb_x:KY_(1-x)(WO_4)_2晶体的生长与结构及光谱性能(英文)
作者:王成伟 张莹 张学建 曾繁明 刘景和  
单位:中国兵器科学研究院 长春理工大学 吉林建筑工程学院 长春理工大学 长春理工大学 北京100089 长春130022 长春130021 长春130022 长春130022 
关键词:掺镱钨酸钇钾晶体  钨酸镱钾晶体  光谱性能  顶部籽晶提拉法 
分类号:O782.5
出版年,卷(期):页码:2007,35(6):774-777
DOI:
摘要:

用顶部籽晶提拉法(top seeded solution growth,TSSG)生长出Ybx:KY1-x(WO4)2(x=5%,摩尔分数,下同)和KYb(WO4)2晶体,比较了两者的结构和光谱性能。工艺参数:转速为10—15r/min,提拉速率为1—2mm/d,生长周期为10—15d,降温生长速率为0.05—0.1℃/h,降温速率为20℃/h。X射线衍射分析表明:两者均为低温相的β-KYW结构,计算了2种晶体的晶格常数。测试了红外及Raman光谱,Ybx:KY1-xW(x=5%)样品在925,891,840,777,749 cm-1具有较强的红外吸收峰,是由WO4原子基团伸缩振动引起的;KYbW样品在484,437 cm-1处具有较强的红外吸收峰,反映了WO4原子基团的弯曲振动。分析了晶体的振动模式,认为2种晶体有较强的Raman活性,钨氧双桥键WOOW和单桥键WOW基团的振动在200~1 000 cm-1范围内,对峰值与相应的振动进行了指认。

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The Ybx:KY1-x(WO4)2(x=5%,molar fraction,the same below)and KYb(WO4)2 crystals were grown by the top seeded so-lution growth(TSSG)method.Both their structure and spectral properties were compared.The growth conditions of crystals were specified as follows:the rotation rate was 10—15 r/min;the pulling speed was 1—2 mm/d;the growing period was 10—15 d;the cooling growing rate was 0.05—0.1℃/h;the cooling rate was 20℃/h.Then powder X-ray diffraction analysis was applied to the crystal powder.The peaks had aβ-KYW structure with a low thermal phase.The cell parameters of the two crystals were calculated,too.After that,the infrared spectrum and Raman spectrum of the crystals were examined.The sample of Ybx:KY1-xW(x=5%)had strong infrared absorption peaks at 925,891,840,777 cm-1,and 749 cm-1,which were caused by stretching vibration of WO4.The KYbW sample had strong infrared absorption peaks at 484 cm-1 and 437 cm-1 caused by bending vibration of WO4.The vibration modes were analyzed and the vibration frequencies of the vibrat ory activity were identified.The two crystals had strong Ramaacntiv-ity.Vibrational bridge bonds of WOOW and WOW existed from 200 cm-1 to 1 000 cm-1.

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参考文献:

[1]FAN T Y.Heat generation in Nd:YAG and Yb:YAG[J].IEEE J Quantum Electron,1993,29(6):1 457-1 459. [2]ZHANG Lijie,LEI Ming,WANG Yuming,et al.Growth,structure and spectral properties of Yb3 +-doped KY(WO4)2[J].Acta Physica Sinica(in Chinese),2006,55(6):3 141-3 145. [3]BRENIER A.A new evaluation of Yb3 +-doped crystals for laser appli- cations[J].J Lumin,2001,92:199-201. [4]KLOPP P,GRIEBNER U,PETROV V,et al.Laser operation of the new stoichiometric crystal KYb(WO4)2[J].Appl Phys B,2002,74: 185-189. [5]WANG Yingwei,CHENG Haobo,ZHU Zhongli,et al.Structure and vibration spectrum of laser crystal Yb:KGd(WO4)2[J].J Inorg Mater (in Chinese),2005,20(6):1 295-1 300. [6]MACALIKA L,HANUZAA J,KAMINSKIIB A A.Polarized Raman Spectra of the oriented NaY(WO4)2 and KY(WO4)2 single crystals[J]. J Mol Struct,2000,555:289-297.

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