Wei Meng-En, Cheng Ting-Qing, Dou Ren-Qin, Zhang Qing-Li, Jiang Hai-He
Opt Lett. 2021 Oct 1;46(19):5016-5018. doi: 10.1364/OL.442131.
We report on a high-peak-power electro-optically -switched laser emitting a near-diffraction-limited beam profile at 1064 nm by using a gradient-doped Nd:YAG crystal. The gradient-doped crystal features a unique combination of a reduced thermal lens effect through effectively spreading the heat load distribution within its volume. Its performance is compared with those of Nd:YAG crystals with uniform volume doping distribution operating in the -switched regime with the same laser configuration, demonstrating the higher average and peak power achievable with the gradient-doped crystal. The maximum average output power amounts to 6.9 W at a pulse repetition rate of 2 kHz, which corresponds to a maximum peak power of ∼585. Compared to homogeneous dopant crystals, the slope efficiency and average output power increased by 30.8% and 21.1%, respectively.
我们报道了一种高峰值功率的电光开关激光器，它通过使用梯度掺杂的Nd:YAG晶体，在1064nm波长处发射出接近衍射极限的光束轮廓。梯度掺杂晶体具有独特的组合特性，即通过有效分散其体积内的热负载分布来降低热透镜效应。将其性能与在相同激光配置下工作于开关模式的具有均匀体积掺杂分布的Nd:YAG晶体进行比较，结果表明梯度掺杂晶体能够实现更高的平均功率和峰值功率。在2kHz的脉冲重复频率下，最大平均输出功率达到6.9W，这对应着约585的最大峰值功率。与均匀掺杂晶体相比，斜率效率和平均输出功率分别提高了30.8%和21.1%。
