Sun Yue, Xu Degang, Zhao Yuantao, Li Zhenzuo, Wang Yuye, Chen Kai, Yao Jiyong, Zhong Kai, Li Jining, Yao Jianquan
Opt Express. 2025 Mar 10;33(5):10312-10324. doi: 10.1364/OE.538688.
In this paper, a high-stability, high-pulse-energy 1064 nm electro-optic (EO) Q-switched laser at a repetition rate of 1 kHz has been demonstrated. The thermal lensing of composite Nd:YAG crystal was theoretically analyzed based on the simulation of the temperature distribution process. A thermally-compensated flat-convex laser cavity was developed to increase laser mode volume. The maximum single pulse energy of 9.1 mJ with a pulse width of 11.4 ns was achieved under the average pump power of 40 W, corresponding to the peak power of 0.8 MW and the slope efficiency of up to 40.4%. Besides, the pulse timing jitter was less than 600 ps, and the energy fluctuation in 40 minutes was about 0.09%. Based on a BaGaSe optical parametric oscillator (BGSe-OPO), the average power of 564 mW with a pulse width of 9.8 ns was achieved at 3.88 µm. Moreover, a wide tuning range of 3.0-5.04 µm was obtained by crystal angle tuning method. This compact laser system is a promising laser source for remote sensing and jamming.
本文展示了一种重复频率为1 kHz的高稳定性、高脉冲能量1064 nm电光（EO）调Q激光器。基于温度分布过程的模拟，对复合Nd:YAG晶体的热透镜效应进行了理论分析。开发了一种热补偿平凸激光腔以增加激光模式体积。在40 W的平均泵浦功率下，实现了最大单脉冲能量9.1 mJ，脉冲宽度为11.4 ns，对应峰值功率0.8 MW，斜率效率高达40.4%。此外，脉冲定时抖动小于600 ps，40分钟内的能量波动约为0.09%。基于BaGaSe光学参量振荡器（BGSe - OPO），在3.88 µm处实现了平均功率564 mW，脉冲宽度9.8 ns。此外，通过晶体角度调谐方法获得了3.0 - 5.04 µm的宽调谐范围。这种紧凑的激光系统是一种有前途的用于遥感和干扰的激光源。
