Cho C Y, Cheng H P, Chang Y C, Tang C Y, Chen Y F
Opt Express. 2015 Mar 23;23(6):8162-9. doi: 10.1364/OE.23.008162.
An energy adjustable passively Q-switched laser is demonstrated with a composite Nd:YAG/Cr⁴⁺:YAG crystal by applying a wedged interface inside the crystal. The theoretical model of the monolithic laser resonator is explored to show the energy adjustable feature with different initial transmissions of the saturable absorber at the horizontal axis. By adjusting the pump beam location across the Nd:YAG crystal, the output pulse energy can be flexibly changed from 10.9 μJ to 17.6 μJ while maintaining the same output efficiency. The polarization state of the laser output is found to be along with the polarization of the C-mount pump diode. Finally, the behavior of the multi-transverse-mode oscillation is also discussed for eliminating the instability of the pulse train.
通过在晶体内部应用楔形界面，利用复合Nd:YAG/Cr⁴⁺:YAG晶体演示了一种能量可调的被动调Q激光器。探索了单片激光谐振器的理论模型，以展示在水平轴上具有不同初始透过率的可饱和吸收体的能量可调特性。通过调整泵浦光束在Nd:YAG晶体上的位置，输出脉冲能量可在保持相同输出效率的同时，从10.9 μJ灵活变化到17.6 μJ。发现激光输出的偏振态与C型安装泵浦二极管的偏振方向一致。最后，还讨论了多横模振荡的行为，以消除脉冲序列的不稳定性。
