Souilhac D, Billerey D, Gundjian A
Appl Opt. 1990 Apr 20;29(12):1798-804. doi: 10.1364/AO.29.001798.
The first single element 2-D acoustooptic (2DAO) laser beam deflector using a tellurium crystal was designed and fabricated for laser wavelength applications from 5 to 20 microm. The giant values of the figure of merit M associated with these two AO interactions equal to 285,000 x 10(-15) s(3)/kg, are between 2 and 3 orders of magnitude higher than germanium, the next best AO material for 10.6 microm. This latter value indicates that acoustic power densities inside the crystal of the order of 0.1 W/mm(2) are sufficient to diffract 100% of the incident light. The experimental data confirm the predicted 13 degrees /25 MHz deflection slope. The theoretical amplitude and frequency modulation characteristics of the 2DAO deflector are also evaluated.
首个使用碲晶体的单元素二维声光（2DAO）激光束偏转器被设计并制造出来，用于5至20微米的激光波长应用。与这两种声光相互作用相关的品质因数M的巨大值等于285,000×10^(-15) s³/kg，比锗（10.6微米下性能次优的声光材料）高出2至3个数量级。后一个值表明，晶体内部0.1 W/mm²量级的声功率密度足以使100%的入射光发生衍射。实验数据证实了预测的13°/25 MHz偏转斜率。还评估了2DAO偏转器的理论幅度和频率调制特性。
