二极管泵浦折叠式电光调Q激光器

LD pumped folded electro-optic Q-switched laser

针对机载激光测距及激光指示应用需求,设计了一种紧凑可靠的电光调Q脉冲激光器。从调Q速率方程出发,分析了激光器输出能量随优化参数z增大而增大、脉宽随z增大而减小的关系。采用6mm×56mm的Nd∶YAG激光晶体,LD侧面泵浦,角锥棱镜作为折光器的u形折叠式非稳腔,在增益满足的前提下,提高谐振腔抗失调能力。在注入电脉冲1.2J条件下,激光器单脉冲能量输出为108mJ,脉冲宽度为11.8ns,能量不稳定度<0.8%;光-光效率18%,可长时间稳定运行。

Aiming at the applying demand of airborne laser ranging and laser indication, a com- pact and reliable electro-optical Q-switched laser was designed. Based on the rate equation with Q-switched, the relationship that the laser output energy increased with the increasing optimization parameter z and the pulse width decreases with increasing z was analyzed. The Nd ＂ YAG laser crystal of ~6.5mm × 56 mm , LD side pump,u model of folded cavity which applied cubecorner prism for folding the light, was used as the resonator cavity. The anti-misalignment ability of resonator cavity can be improved under the premise of gain satisfaction. Under the condition of 1.2 J implanted electrical pulse, the energy output of laser single pulse is 108 mJ, the pulse width is 11.8 ns, the energy instability is less than 0.8% and the light efficiency is 18% , which can be stably operated for a long time.