用于高能激光器的气体束流 dump 与功率计
Gas Beam Dump and Power Meter for High Energy Lasers
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中文总结 AI 辅助
该研究针对高能激光器，开发了基于臭氧哈特莱带吸收的气体束流 dump 与功率计，验证了臭氧吸收模型，实现了毫焦级脉冲能量的精确测量，证明气相吸收体可作为高损伤阈值、无碎屑的能量诊断平台。
中文摘要 AI 辅助
气态光学元件的激光诱导损伤阈值远高于固体材料，可实现高强度运行且无永久退化。本文介绍了一种基于气体的束流 dump 和功率计，利用臭氧在哈特莱带（200-320 nm）的强吸收特性。我们开发并实验验证了臭氧吸收模型，该模型可预测完全能量沉积所需的传播长度及产生的气体温度升高。通过将温度升高与入射脉冲能量校准，我们实现了全气体吸收体对毫焦级脉冲能量的精确测量。这些结果表明，气相吸收体可作为可扩展、无碎屑的平台，用于高损伤阈值的束流 dump 和高通量激光器的能量诊断。
英文摘要
Gaseous optics exhibit substantially higher laser-induced-damage thresholds than solid materials, enabling high-intensity operation without permanent degradation. In this Letter, we describe a gas-based beam dump and power meter that exploits the strong absorption of ozone in the Hartley band (200-320 nm). We develop and experimentally validate a model for ozone absorption that predicts the propagation length required for complete energy deposition and the resulting gas temperature rise. By calibrating the temperature rise against incident pulse energy, we demonstrate accurate millijoule-scale pulse energy measurements with an all-gas absorber. These results establish gas-phase absorbers as a scalable, debris-free platform for high-damage-threshold beam dumps and energy diagnostics for high-fluence lasers.
