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报道了千瓦级激光二极管面阵抽运固体热容激光器的理论与实验研究,分别采用Nd∶YAG单板条和双板条串接的热容激光器,利用热容激光器的理论计算模型计算了在一定的工作时间内激光输出特性,并进行了实验验证。实验中采用的晶体尺寸均为59mm×40mm×4.5mm,对单板条进行抽运时平均功率大约为5.6kW,双板条串接时为11.2kW,重复频率为1kHz,占空比为20%。实验中观察了1s的工作时间内脉冲能量输出的波动情况,单板条时单脉冲能量输出最大为1.3J,在1 s后单脉冲能量输出下降到开始的70%左右,而双板条串接时单脉冲能量输出最大为2.06J,在1s后单脉冲能量输出下降到开始的50%左右,对单块晶体采用通水冷却的准热容热管理模式能有效地降低其热效应。
The theoretical and experimental studies on the kilowatt-level laser diode array laser solid-state heat pump were reported. The heat-capacity laser with single-row Nd:YAG and double- Laser output characteristics of a certain working hours, and the experimental verification. The crystal sizes used in the experiment are both 59mm × 40mm × 4.5mm. The average power of pumping single board is about 5.6kW, 11.2kW when the double board is connected in series, the repetition frequency is 1kHz and the duty cycle is 20 %. In the experiment, the fluctuation of pulse energy output was observed during the working time of 1 s. The single-pulse energy output of single-slab was 1.3 J and the single-pulse energy output decreased to about 70% of the initial one after 1 s. The maximum single-pulse energy output is 2.06J after 1s, and the single-pulse energy output drops to about 50% of the initial value after 1s. The thermal heat capacity management mode of single crystal with water cooling can effectively reduce its thermal effect.