双声光二维Q开关

Double Acousto-optic Devices Two-dimensional Q-switch

根据声光互作用理论,给出拉曼-奈斯衍射的超声场相互正交和平行的两声光Q开关器件衍射损耗的表达式,分析了单声光器件、超声场相互平行和正交两声光Q开关器件衍射损耗的关系。采用功率分配器保证两声光Q开关的同步和有效功率驱动。Nd:YAG激光器的实验结果表明,超声场相互正交两声光Q开关的衍射损耗比单声光器件提高近3倍、比超声场相互平行两声光Q开关器件提高1倍。

According to the theory of acoustooptic(AO) interaction,the formulas of diffraction loss of two AO Qswitches,which acoustofiled are perpendicular or parallel one another,with NamanNath diffraction are derived.The relationship about one Qswitch,two Qswitches in acoustofield perpendicular or parallel is analyzed.The power divider for ensuring two AO Qswitch synchronization and effective power driving is designed.The calculation results are satisfied with Nd:YAG laser experimental result.It is show that diffraction loss of two AO Qswitches,which acoustofield are perpendicular to each other is nearly three times large than one AO Qswitch,one time large than the two AO Qswitches which acoustofield are parallel.