【摘要】 报导了一种基于稀土改性的钨酸铅晶体PbWO4:RE3+(RE=La,Y或Gd)的声光调制器。根据实测的钨酸铅晶体中的声速数据,估算了PbWO4单晶的声光优值。结果表明其声光优值与目前常用的钼酸铅晶体十分接近。但是,PbWO4:RE3+在光谱紫外区的截止波长为330nm使它可以在更短的波段工作,并具有抗紫外辐照的能力。该器件的中心频率为80MHz,带宽20MHz,在1W驱动功率下,一级衍射光的衍射效率为85%(He-Cd激光,442nm)。更多还原

【Abstract】 A new acousto-optic modulator based on rare earth ions RE3+-doped lead tungstate singlecrystal is presented. The AO figure of merit of PbWO4 was estimated based on the experimental results of acoustic velocity measurement. It is found that its AO figure of merit M2 is very close to that of PbMO4. Furthermore, RE3+: PbWO4 has much wider transmission range in the near UV spectral region with cut-off wavelength at about 330nm. Besides, it also exhibits enhanced resistance to UV-irradiation damage.The central frequency of the modulator is 80 MHz with 20 MHz bandwidth and the diffraction efficiency for 1st order light beam is 85%with 1 W driving power (He-Cd laser in 442 nm).更多还原