Nd:GdxY1-xCa4O(BO3)3晶体的生长及其光谱性能研究

利用熔体提拉法生长了大尺寸，高质量的新型激光自倍频晶体Nd:GdxY1-x(Ca4O(BO3)3(简称Nd:GdYCOB)，对Nd:GdYCOB晶体的XRD衍射图进行指标化，得到它的晶胞参数为a=8.080A;b=16.016A;c=3.538A,β＝101．18，μ＝491．1A3，对取自不同部位的晶体粉末进行ICP原子发射光 分析表明晶体整体组份均匀一致，根据熔体和晶体粉末的ICP数据计算，Nd:GdYCOB晶体中Nd3 的分凝系数为0．63，首次报道了Nd:GdYCOB晶体200－3000nm室温透过光谱和室温荧光光谱及荧光寿命，室温透过光谱表明Nd:GdYCOB晶体的紫外吸收边在－220nm，具有很宽的透光波段（－220－2700nm);Nd:GdYCOB晶体在800nm附近存在很强的吸收，适合于LD泵汪,为光光谱表明Nd:GdYCOB晶体是一种很有潜力的RGB（red,green,blue)激光自倍频晶体，掺杂4％，5％ Nd:GdYCOB晶体的荧光寿命分别为105us和100us。

Growth and Spectra Properties of Nd:GdxY1-xCa4O(BO3)3 Crystal

Gd_xY_1-xCa₄O(BO₃)₃ (GdYCOB ) crystal is a kind of valuable nonlinear optical crystal. It can realize THG noncritical phase-matching for Nd:YAG laser and keep stable mechanical and chemical properties. Nd³⁺, Gd³⁺ and Y³⁺ are all rare-earth ions, so we can receive Nd:Gd_xY_1-xCa₄O(BO₃)₃ (Nd:GdYCOB) crystal by a few Nd3+ ions doping. Combined laser action of the Nd3+ ions and nonlinear optical properties of GdYCOB host crystal in the mixed crystal, a new kind of self-frequency doubling crystal Nd:GdYCOB was obtained. The synthesis and crystal growth of Nd:GdYCOB crystal were reported in this paper. The transparent spectrum, fluorescent spectrum, and fluorescence lifetime of Nd:GdYCOB crystal were first measured at room temperature.