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开展了激光二极管(LD)抽运的全固态热容激光器的理论与实验研究,数值模拟了在热容工作条件下侧面抽运的Nd∶YAG板条激光器的热透镜效应,分析了热透镜效应对激光输出的影响,并进行了相应的实验论证。实验中采用的晶体尺寸为57mm×40mm×4mm,激光二极管阵列的抽运峰值功率为12kW,重复频率为1kHz,占空比为20%,为了获得较高的增益,将抽运光通过光学系统进行聚焦,抽运光在晶体侧面的光斑大小为15mm×57mm.实验中观察了1s内的脉冲能量输出的波动情况,在开始工作的时候单脉冲能量输出为1J,在1s后单脉冲能量输出下降到开始的50%。
A theoretical and experimental study of all-solid-state heat-driven lasers using laser diode (LD) pumping is carried out. The thermal lens effect of Nd: YAG slab laser pumped laterally under heat capacity operation is numerically simulated. The thermal lens effect The impact of laser output, and the corresponding experimental proof. The crystal size used in the experiment was 57 mm × 40 mm × 4 mm. The laser diode array had a peak pumping power of 12 kW, a repetition frequency of 1 kHz and a duty cycle of 20%. To obtain a higher gain, the pump light was passed through an optical system The spot size of the pump light on the side of the crystal is 15mm × 57mm. The fluctuation of the pulse energy output in 1s was observed in the experiment. At the beginning of the work, the single-pulse energy output was 1J. After 1s, the single-pulse energy output Drop to the beginning of 50%.