采用熔融一急冷法制备了(100-x)GeS2-x[0.5Ga2 S3-0.5CdS]硫系玻璃,通过Maker条纹法研究了5kV、280℃、30min的极化条件下,SH强度、二阶非线性系数χ(2)大小的结构依赖性.结果表明,玻璃的SH强度和二阶非线性系数χ(2)与组成的变化关系曲线不呈线性变化,当x=30时,达最大值(χ(2)≈4.36pm/V),是因为随Ga2S3、CdS引入量的增加,玻璃的无规网络的连接程度先逐渐增强然后逐渐减弱,偶极子数量先逐渐减少然后逐渐增加,导致极化后玻璃中重新分布进行取向性调整的偶极子数量不同所致.
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