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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Yb:NGW激光晶体生长及光谱性能
Abstract:
采用提拉法生长了φ30mm×70mm的掺镱钨酸钆钠[YbNaGd(WO4)2,YbNGW]晶体,并对晶体进行了退火处理。讨论了YbNGW晶体的生长工艺。确定了最佳生长工艺参数为提拉速率为1～2mm/h,转速为15～18r/min,冷却速率为10℃/h,轴向温度梯度为液面上0.7～1℃/mm。通过热重–差热分析(thermogravimetry–differentialthermalanalysis,TG–DTA),X射线衍射(X-raydiffraction,XRD)对退火的晶体进行表征。测试了晶体的红外光谱和Raman光谱,并对出现的峰值进行了振动归属。测量了晶体的吸收光谱和荧光光谱。由TG–DTA曲线得到晶体熔点为1252.02℃。XRD分析表明晶体属于四方晶系、白钨矿结构、I41/a空间群,计算的晶胞参数a=0.53603nm,c=1.11628nm。吸收光谱显示晶体在968nm处吸收峰最强,半峰宽为57nm,适合激光二极管泵浦。
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