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对于连续泵浦的内腔式倍频、参量振荡等非线性激光器件,常需要准连续运转来提高腔内的峰值功率,声光调Q是目前获得准连续运转激光器的重要途径。在LD端泵a向生长Nd:GdVO4晶体1.34μm静态激光的基础上,利用声光调Q对1.34μm的动态激光进行了实验研究。当声光调Q器件重复率为5kHz时,获得的最短脉宽为170ns,此时的单脉冲能量为44.8μJ,峰值功率为256W。实验表明,1.34μm平均功率随声光调Q的重复率增加而增大,脉冲宽度随重复率的减小而变短,因而低重复率下可得到更高的峰值输出功率。
For continuously pumped intracavity frequency doubling, parametric oscillation and other nonlinear laser devices often require quasi-continuous operation to increase the peak cavity power, acousto-optic Q modulation is now an important way to obtain quasi-continuous operation of the laser. Based on the 1.34μm static laser grown on Nd: GdVO4 crystal in the LD end pump a, a dynamic 1.34μm laser was experimentally studied by acousto-optic Q-switching. When the acousto-optic Q-switched device has a repetition rate of 5 kHz, the shortest pulse width obtained is 170 ns. At this time, the single-pulse energy is 44.8 μJ and the peak power is 256W. The experimental results show that the average power of 1.34μm increases with the repetition rate of acousto-optic Q, and the pulse width decreases with the decrease of the repetition rate, so higher peak output power can be obtained at low repetition rate.