不同腔型Cr^(4+)∶YAG被动调Q激光器

Cr^(4+)∶YAG Passively Q-Switched Laser in Different Cavity Configurations

以新型可饱和吸收体 Cr4 +∶ YAG晶体作为调 Q开关 ,在平 -凸非稳腔和平 -平介稳腔中实现被动调 Q运转 .分别获得能量为 70 .5m J和 2 9.7m J,脉宽为 2 3ns和 2 0 ns,能量起伏为 1.9%和 3.8%的调 Q单脉冲输出 .实验结果表明 ,非稳腔有利于输出能量和稳定性的提高 ,理论分析和实验结果相符 .

By using a new saturable absorber Cr 4+ ∶YAG crystal as Q modulated switch, passively Q modulated operation is realized in a plane convex unstable resonator and a plane plane critical stable resonator. The Q modulated single pulse output with energy of 70.5 mJ and 29.7 mJ, pulse width of 23 ns and 20 ns, and energy fluctuations of 1.9% and 3.8% are obtained respectively.As shown by experimental results, unstable resonator is beneficial to the enhancement of output energy and stability. Theoretical analysis is in agreement with experimental results.