【摘要】 钨酸钆钾(KGd(WO4)2,简称KGW)是一种新型的激光基质材料。以Yb3+作为Ho3+的敏化剂,采用泡生法生长出了单斜晶系的Ho∶Yb∶KGW晶体。通过X射线衍射仪(XRD)分析确认所生长的晶体为-βHo∶Yb∶KGW。热重与差热分析(TG-DTA)测试结果表明,晶体的熔点为1072.31℃,相变温度为1043.09℃。测试了晶体的吸收光谱,对吸收峰值归属进行了确认,计算了相应的光谱参数。Yb3+在981 nm处吸收峰较强,半峰全宽(FWHM)为14 nm。从荧光光谱可以看出,在1022 nm附近,Yb3+发射主峰的半峰全宽达16 nm,对应的是Yb3+的2F5/2和2F7/2的能级之间的跃迁;Ho3+在1985 nm处的荧光发射峰半峰全宽为45 nm左右,发射截面积为1.79×10-20cm2。更多还原

【Abstract】 Potassium gadolinium tungstate(KGd(WO4)2,KGW) is a new kind of laser matrix material.With Yb3+ as sensitizer for Ho3+,monoclinic-like Ho∶Yb∶KGW crystal has been grown by the Kyropoulos method,which is identified as β-Ho∶Yb∶KGW by X-ray diffractometer(XRD).The melting point and transition point temperatures of the crystal are 1072.31 ℃,1043.09 ℃ determined by thermal gravity and differential thermal analysis(TG-DTA).The absorption spectrum of the crystal has been measured,the assignation of the absorption peak has been discussed,and the corresponding spectral parameter has been calculated. The absorption peaks of Yb3+ at 981 nm is intensive,and the full width at half maximum(FWHM) is 14 nm.It is indictaed from photoluminescence spectrum that the emission line width(FWHM) at the chief peak of Yb3+ 1022 nm reaches 16 nm,corresponding to the transition between energy levels 2F5/2 and 2F7/2 of Yb3+.The photoluminescence emission peak FWHM of Ho3+ at 1985 nm is about 45 nm,and the emission cross section is 1.79×10-20 cm2.更多还原