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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。
Gadolinium tungstate (KGd (WO4) 2, referred to as KGW) is a new type of laser matrix material. Using Yb3 + as the sensitizer of Ho3 +, monoclinic Ho:Yb:KGW crystals were grown by bubble generation method. It was confirmed by X-ray diffraction (XRD) analysis that the grown crystal was -βHo: Yb: KGW. The results of TG-DTA showed that the melting point of crystal was 1072.31 ℃ and the phase transition temperature was 1043.09 ℃. The absorption spectrum of the crystal was tested, the absorption peak assignment was confirmed, and the corresponding spectral parameters were calculated. The absorption peak of Yb3 + at 981 nm is strong, and the full width at half maximum (FWHM) is 14 nm. From the fluorescence spectra, it can be seen that the full width at half maximum of Yb3 + emission peak around 16 nm at 1022 nm corresponds to the transition between the energy levels of 2F5 / 2 and 2F7 / 2 of Yb3 + The full width at half maximum of the fluorescence emission peak is about 45 nm, and the emission cross-sectional area is 1.79 × 10-20 cm 2.