Nd:NaR(WO_4)_2晶体光谱性能研究(R=Bi,Y)

Spectroscopy of Nd:NaR(WO_4)_2 Single Crystal(R=Bi,Y)

采用提拉法生长出了掺钕钨酸铋钠(分子式Nd:NaBi(WO4)2,简称Nd:NBW)和掺钕钨酸钇钠(分子式Nd:NaY(WO4)2,简称Nd:NYW)晶体。通过TG-DTA分析得到Nd:NBW的熔点为936.2℃,Nd:NYW的熔点为1209.07℃。由吸收光谱可以看出,Nd:NBW在802nm有较强的吸收峰,Nd:NYW在804nm,752nm,586nm附近有较强、较宽的吸收峰,二者均适合于LD泵浦;并计算了晶体中Nd3+的吸收截面积。通过比较Nd:NBW和Nd:NYW的红外光谱和拉曼光谱结果,认为二者结构基本相同,为四方晶系、白钨矿结构、I41/a空间群。

In this paper, Nd：NBW and Nd：NYW single crystal has been grown by the Czochralski method. The Nd：NBW and the Nd：NYW crystal with a melting point being 936.2℃ and 1208.7℃ respectively were obtained from the differential thermal analysis. Absorb peaks of Nd：NBW crystals at 802 nm are better, the Nd：NYW at 804 nm, 752 nm, 586 nm are better and wider, and they are suitable for LD pump. The absorption cross-sections of Nd^3＋ were calculated. By Comparing IR spectra and Raman spectra of Nd：NBW and Nd：NYW, we find that the structure of them is identical： tetragonal scheelite-type 141/a space group.