坩埚下降法沿<010>和<001>方向生长了直径达到25mm的完整透明的Ca4YO(BO3)3(YCOB)晶体.化学腐蚀结果表明,所生长晶体无孪晶或亚晶界等缺陷,晶体尾部的位错密度不超过1800/cm2.测量了YCOB的透射光谱,其截止波长为200nm.进行了YCOB晶体对Nd:YAG激光的二次倍频实验.通过与KDP晶体对比,计算出YCOB晶体的有效非线性系数在Ⅰ型相位匹配方向(θ,φ)=(66.3°,143.5°)和(65.9°,36.5°)上分别为1.45pm/V和0.91pm/V,大于KDP和LBO晶体.在脉冲宽度10ns的Nd:YAG激光单脉冲辐射下YCOB晶体出现体损伤的激光损伤阈值不低于85GW/cm2.
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