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-xCa4O(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α＝8.080A;b＝16.016A;c＝3.538A ; β＝101.18°;v＝491.1A3。对取自不同部位的晶体粉末进行ICP原子发射光谱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Nda+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～220um，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泵浦。荧光光谱表明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105ps和100μs.
GdxYi-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:GdxYi-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.
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