摘要
采用一种改进的布里奇曼方法生长出光学质量的ＡｇＧａＳｅ＿２单晶体。晶棒尺寸通常为Φ２５ｘ８０ｍｍ。生长的晶体在添加有Ａｇ＿２Ｓｅ粉末中高温退火处理，使晶体的光透过率显著地改善。用红外光源丝网成象法，红外显微照相，常规分光光度计，付里叶变换红外光谱仪和Ｘ射线衍射对退火前后的晶体质量进行了检测。用一台ＴＥＡＣＯ＿２激光，脉冲泵浦一片１２ｍｍ长Ⅰ型匹配的倍频晶体样品，实现了１０．６μｍ波长向５．３μｍ波长的倍频。
Optical quality AgGaSe_2 single crystals were grown by a modified Bredgman technique. Boule sizes are typically 25mm diameter by 80mm long.The optical transparency of as-grown crystals have been substantially improved by annealing in the presence of Ag_2Se. As - grown and annealed crystal samples were characterized by using IR wire mesh imaging,photomicrography,conventional speetrophotometer, fouriertransform IR spectroscopy,and X- ray. A sample 12mm long was prepared for type I phase-matching second harmonic generation. By pumping the sample with pulses from a TEA CO_2 laser,doubling from 10.6μm to 5.3μm has been demonstrated.
出处
《人工晶体学报》
CSCD
1995年第3期193-197,共5页
Journal of Synthetic Crystals
基金
国家科委863高科技资助
关键词
硒化银镓
非线性光学
晶体
红外晶体
晶体生长
silver selenogallate
nonlinear optical crystals
Bridgman method
infrared crystals
frequency doubling
