在超连续辐射下使用宽带激光保护反射器的光谱集成热吸收模型
Yukang Feng1,2, Yanzhi Wang1,2, Yulin Zhang1,2
1Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|February 15, 2026
概括
高功率激光损坏目标,但纳米多层涂层提供保护. 一个新的模型显示,以短波长优先考虑的反射器最好地管理激光能量吸收,并减少温度升高,以提供宽带激光保护.
科学领域:
- 光学和光子学 在光学和光子学.
- 材料科学 材料科学 材料科学
- 激光物理 激光物理
背景情况:
- 高功率的多波长激光会对有价值的目标造成热损伤.
- 具有高反射性的纳米级多层涂层对于激光保护至关重要.
- 关于这些涂层在多波长辐射下的热反应及其宽带保护能力的研究有限.
研究的目的:
- 为纳米多层涂料开发一种通用激光能量吸收模型.
- 设计和实验验证超宽带全介电纳米多层反射器.
- 在超连续激光照射下研究热反应和保护机制.
主要方法:
- 提出了一种基于光谱强度集成的全新通用激光能量吸收模型.
- 设计的超宽带全介电纳米多层反射器 (平均反射率>99.9%从450-1200nm).
- 在超连续激光照射下实验评估反射器温度,并使用有限元素方法进行模拟.
主要成果:
- 能量吸收模型揭示了指数式衰变行为,其特点是两个吸收系数.
- 短波长的吸收比长波长的吸收对温度上升的贡献更大.
- 一个以短波长为优先的反射器显示了最小的温度增加,这证明了它对宽带激光保护有效.
结论:
- 开发的模型准确地预测了激光照射下的反射器温度升高,并通过实验数据验证了这一点.
- 短波长优先反射器对于宽带激光保护非常有效.
- 这些发现为激光保护反射器的热评估和设计提供了宝贵的见解.
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