分析了单声光器件、超声场相互平行和相互正交的两声光Q开关器件衍射损耗,给出正常布喇格衍射的超声场相互平行和相互正交的双声光Q开关器件衍射效率的表达式。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,超声场相互平行双声光Q开关的关断损耗比单声光器件提高了1倍多,而超声场相互正交双声光Q开关的关断损耗比单声光器件提高了2倍多,能够有效的关断大功率固体连续激光。 The diffraction loss of two acousto-optic Q-switched devices with parallel and orthogonal ultrasound fields are analyzed. The diffraction efficiencies of two-acousto-optic Q-switched devices with normal Bragg diffraction are parallel and orthogonal to each other Expression. The use of power splitter to ensure the two sound and light Q-switch synchronous and effective power-driven. The experimental results of Nd: YAG laser show that the turn-off loss of the two-acousto-optic Q-switch in the ultrasonic field is more than double that of a mono-optic device, while the turn-off loss of the two-acousto-optic Q- Acousto-optic devices increased more than 2 times, can effectively shut down high-power solid-state continuous laser.