双控声光调Q全固态红外激光器

研制出双控声光调Q全固态红外激光器。应用专门研制的双控驱动器,代替普通声光调Q全固态红外激光器中独立的激光二极管(LD)驱动器和声光Q开关驱动器。在双控驱动器中,抽运源激光二极管和Q开关都工作在与输出激光脉冲相同重复频率的间断工作状态。在每一个周期中,激光二极管在输出激光脉冲前的某一时刻打开,在输出脉冲后的适当时刻关断。声光Q开关在激光二极管打开前的某一时刻开始工作,在激光二极管关闭后的某一时刻停止工作。与普通声光调Q全固态激光器相比,在输出激光脉冲重复频率相同的情况下,双控驱动全固态红外激光器能耗减少50%以上,主要部件温升减少10℃以上,达到热稳定的时间减少到23%,用1 W的激光二极管抽运,得到了脉宽16.8 ns,峰值功率4 kW的无寄生脉冲的激光输出。

Double-Control Acousto-Optic Q-Switched All-Solid-State Infrared Laser

A new type of double-control acousto-optic (A-O) Q-switched all solid state laser has been developed. A special home-made double-control driver, instead of a laser diode (LD) driver and an unattached A-O Q-switcher driver as used in the normal A-O Q-switched solid-state lasers, is used in the laser. In the double-control driver, both LD and the A-O Q-switcher work periodically at the same repetition rate as the output laser pulses. In each period, LD lights in advance of the time of the output laser pulse occurrence and quenches behind the laser pulse. At the same period, A-O Q-switcher starts working before LD and stops working behind LD. The new type of solid state infrared laser has much better performance in compare with the normal A-O Q-switched solid-state lasers at the same repetition rates: electric power saving more than 50%, temperature rising at main parts of the laser set dropping down with more than 10 ℃, time taken for thermally stable state being reduced to 23%. Pumped by a 1 W LD, the non-spurious output pulses with peak power of about 4 kW and width of 16.8 ns are obtained.