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文中介绍了应用于高功率 DPL 调 Q 的声光 Q 开关组件,描述了声光 Q 开关的工作原理,着重介绍了声光 Q 开关关键指标衍射效率、插入损耗的设计方法,给出了驱动电源的设计框图、调 Q 同步电路的设计考虑,降低电脉冲下降时间的思路,得到了工作波长1.064 μm,通光长度44 mm,光束直径3.5 mm,衍射效率85%,关断 DPL 连续功率331 W,腔内插入损耗8%,内调制频率500 Hz-10 kHz 连续可调,电脉冲下降时间100 ns,电路延时时间50 ns～1μs可调的实验结果。该组件衍射效率高、插入损耗低。已小批量用于激光表演机、大功率激光打标机,激光毛化机等系统中,也可用于激光测距机、激光雷达、激光卫星间通信等方面,具有广阔的应用前景。
The paper introduces the acousto-optic Q-switch components used in high-power DPL Q-switching, describes the working principle of the acousto-optic Q-switch, emphatically introduces the design method of diffraction efficiency and insertion loss of key indicators of acousto-optic Q switch, The working wave length 1.064 μm, the light transmission length 44 mm, the beam diameter 3.5 mm, the diffraction efficiency 85% and the continuous power of DPL 331 W were turned off , The insertion loss in the cavity is 8%, the internal modulation frequency is adjustable continuously from 500 Hz to 10 kHz, the falling time of the electrical pulse is 100 ns and the circuit delay time is adjustable from 50 ns to 1 μs. The component diffraction efficiency, low insertion loss. Small quantities have been used in laser performance machines, high-power laser marking machines, laser texturing machines and other systems, and can also be used in laser ranging machines, laser radar, laser satellite communications and other aspects, has broad application prospects.