KNbO_3高效倍频产生427～470nm蓝紫光

厚1.5 mm的KNbO_ 3晶体在室温下角度相位匹配倍频脉冲参量激光获得427～470nm蓝紫光,能量转换效率超过40％,输出单脉冲蓝紫光的峰功率达60kW.对相位匹配曲线、倍频效率与基波光强的关系和相应匹配角允差作了计算和讨论.     

RAMAN SPECTROSCOPIC STUDY OF Nd-DOPED LITHIUM TANTALATE

Raman spectra of Nd-doped LiTaO₃ have been measured at right angle scattering geome-tries at room temperature. The spectra have drastically anomalous phenomena as compared with those of pure LiTaO₃. We may attribute these anomalies to the enhanced photoinduced refractive index change and the change of LiTaO₃ microstructure resulting from Nd doping.