硼酸铅玻璃的光学二次谐波产生

对硼酸铅玻璃体材料样品进行热辅助的平板电场极化(简称热极化)后,通过观察其光学二次谐波(SHG)信号的强弱,得到了不同组分的样品的最佳极化温度,发现其最佳极化温度与玻璃化温度满足一定的关系;同时得到了不同组分的样品在各自的最佳极化温度条件下极化后的二次谐波信号强度与组分的关系;经过对一种组分的样品进行细致研究,发现样品的二次谐波信号强度随着极化电压的增大而增大,并满足幂函数关系.利用有效偶极子释放模型解释了样品的二次谐波信号强度与极化电压之间的超平方关系 关键词： SHG 玻璃 极化

Second-harmonic generation in bulk PbO/B2O3 glass

By investigating the Second-Harmonic Generation (SHG) of the bulk PbO/B 2O 3 glass sample with different compositions after thermopoling,it was found that there was an optimal poling temperature for each sample with different composition and there was a relation between optimal temperature and glass transition temperature.At their own optimal temperatures,samples had different frequency doubling efficiencies.We also found that the frequency doubling efficiency increased with the increase in poling voltage.We used a model of the release of effective dipoles which had been proposed to explain the super-quadratic relation between the second-order nonlinearity and the poling voltage of the bulk PbO/B 2O 3 glass.