With the ever-increasing laser power and repetition rate, thermal control of laser media is becoming increasingly important. Except for widely used air cooling or a bonded heat sink, water cooling of a laser medium is more effective in removing waste heat. However, how to protect deliquescent laser media from water erosion is a challenging issue. Here, novel waterproof coatings were proposed to shield Nd:Glass from water erosion. After clarifying the dependence of the waterproof property of single layers on their microstructures and pore characteristics, nanocomposites that dope SiO₂ in HfO₂ were synthesized using an ion-assisted co-evaporation process to solve the issue of a lack of a high-index material that simultaneously has a dense amorphous microstructure and wide bandgap. Hf_0.7Si_0.3O₂/SiO₂ multifunctional coatings were finally shown to possess an excellent waterproof property, high laser-induced damage threshold (LIDT) and good spectral performance, which can be used as the enabling components for thermal control in high-power laser cavities.

随着激光功率和重复频率的不断提高，激光介质的热控制变得越来越重要。除了广泛使用的空气冷却或粘合式散热器以外，激光介质的水冷在去除废热方面更为有效。然而，如何保护潮解性激光介质不受水侵蚀是一个具有挑战性的问题。在此，提出了新颖的防水涂料来保护Nd：Glass免受水侵蚀。在澄清了单层的防水性能对其微观结构和孔隙特征的依赖性之后，使用离子辅助共蒸发工艺合成了在HfO ₂中掺杂SiO _2的纳米复合材料，从而解决了缺乏高折射率材料的问题同时具有致密的非晶态微结构和宽带隙。高频最终显示出_0.7 Si _0.3 O ₂ / SiO ₂多功能涂层具有优异的防水性能，较高的激光诱导损伤阈值（LIDT）和良好的光谱性能，可作为大功率激光器热控制的使能组件。蛀牙。