A face-pumped Nd:YAG slab laser with high-power output and temperature fluctuation adaptability is proposed and demonstrated for the first time. A two-dimensional (2D) vertical-cavity surface-emitting laser (VCSEL) array at 808 nm with a low wavelength shift coefficient is used as the pump source with a total pump power of 1.38 kW. The array is cooled by a double-layer vascularized macro-channel heat sink for effective heat management. A 1064 nm maximum power of 437 W from the slab laser is obtained by optimizing the output coupling, and the power variation is only ±4.9% over the temperature range from 16 °C to 34 °C. The results show that the high-power slab laser pumped by VCSEL has an excellent performance in temperature tolerance and lower requirements for coolant, which is only water cooled by the macro-channel heat sink and no need for deionized water; it also provides a solution for high power lasers used in the complicated environment. Furthermore, it is possible to scale the output power to ~kW-level by further increasing the VCSEL pump power.

中文翻译：

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具有温度波动适应性的高功率 VCSEL 泵浦板条激光器


首次提出并演示了具有高功率输出和温度波动适应性的面泵浦Nd:YAG板条激光器。采用具有低波长漂移系数的808 nm二维（2D）垂直腔面发射激光器（VCSEL）阵列作为泵浦源，总泵浦功率为1.38 kW。该阵列由双层血管化宏通道散热器冷却，以实现有效的热管理。通过优化输出耦合，获得了板条激光器的1064 nm最大功率437 W，并且在16°C至34°C的温度范围内功率变化仅为±4.9%。结果表明，VCSEL泵浦的高功率板条激光器具有优异的耐温性能，且对冷却剂要求较低，仅通过宏通道散热器进行水冷，无需去离子水；也为复杂环境下使用的高功率激光器提供了解决方案。此外，通过进一步增加 VCSEL 泵浦功率，可以将输出功率扩展到 ~kW 级。