掺钕钨酸钾钆晶体的光谱研究  

Spectroscopic Study of Nd: KGd ( WO_4)_2 Crystal

作　　者：洪元佳[1] 刘景和[2] 李建立[2] 周稳锁[2] 洪广言[1] 

机构地区：[1]中国科学院长春应用化学研究所稀土化学与物理开放实验室,吉林长春130022 [2]长春光学精密机械学院,吉林长春130022

出　　处：《发光学报》2001年第4期389-392,共4页Chinese Journal of Luminescence

摘　　要：本文采用助熔剂籽晶提拉法生长出了Ｎｄ：ＫＷＧ激光晶体。化学组成和结构分析认为，所得的晶体是β－ＫＧｄ（ＷＯ４）２。通过红外光谱和喇曼光谱判断了它的振动归属，通过紫外可见吸收光谱的测定得到了它的峰值吸收截面值。Recently, the neodymium-doped crystal Nd3+ KGd(WO4)2, (or Nd: KWG) lasing at 1067nm was demonstrated that it exhibits highly efficient free-running operation. The laser crystal also possesses other attractive features, such as a strong and broad absorption band that makes this laser medium be an ex- cellent candidate for efficient diode pumping without temperature controlling. The absorption band at o . 8μm of Nd3 + in the crystal is well matched with the emission wavelength of diode, a solid state laser pump which is very convenient and popular in laser science and technology today. Nd: KWG crystal was grown by the TSSG slow cooling method from a suitable flux K2W2O7. TG-DTA tests show Nd: KWG (5at %) crystal has a phase transition at 984℃, which is below the melting point 1044℃. The lower value compared with pure KGW can be explained by the doping of Nd3+ XFA shows the existence of element of W, K, Gd,O, Nd. And the intensities agree with the proportion of raw materials. In IR and Raman spectra, it can be observed that the Ln-O vibration transitions are at 400. 4cm -1, 408cm -1,atom group WO4 flex vibration at 344.8~429cm-1and atom group WO4 bend vibration at 750~ 899.5cm-1. The absorption spectrum of Nd: KWG crystal was measured. It should be noted that there is a strong absorption band at 808nm, the emission wavelength of the laser diode. And, we also calculated the absorption cross sections.

关 键 词：掺钕 钨酸钾钆 激光晶体 TSSG 光谱 Nd:KWG 化学组成 结构分析 

分 类 号：O734[理学—晶体学]