红外非线性晶体材料CdSe具有透光波段宽广,吸收系数低等优点,在中长波尤其是8～12 μm红外波段的频率转换方面有广阔的应用前景,目前已引起国外众多科研机构的极大重视.采用高温元素反应法直接合成CdSe多晶料,利用温度梯度熔体区熔法生长出CdSe单晶,晶体棒毛坯尺寸达Ф19×70 mm;通过X射线粉末衍射、感应耦合等离子体质谱等对多晶原料进行成分分析,原料纯度可达5N;利用低倍率红外显微镜、红外分光光度计检测了晶体的基本光学性能,3～20 μm波段晶体平均吸收系数α约为0.08 cm-1,品质良好,已能满足激光实验要求.
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