In laser-induced breakdown experiments, the absorbed energy is one of the first measured parameters. For a given optical configuration and incident energy, the measured absorbed energy depending on pressure always exhibits a similar curve for the tested gases: argon, nitrogen, carbon dioxide and air. This work presents an empirical modelling to predict the pressure dependence of the absorbed energy in mono-atomic and molecular gas efficiently. The first series of experiments, involving Ar, N 2 and CO 2 , presents its efficiency over pressure from 50 to 2400 mbar and incident laser energies from ∼15 to ∼135 mJ. The second series presents the effectiveness of this modelling on air. All experiments are conducted with a Nd:YAG laser at 532 nm and a focal radius of 4.23 μ m.

中文翻译：

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根据入射激光能量和初始压力对单原子和分子气体中激光诱导的击穿中吸收的能量和压力进行归一化

在激光诱导的击穿实验中，吸收的能量是最早测得的参数之一。对于给定的光学配置和入射能量，根据压力测得的吸收能量始终对被测气体：氩气，氮气，二氧化碳和空气呈现出相似的曲线。这项工作提出了一个经验模型，可以有效地预测单原子和分子气体中吸收能量的压力依赖性。第一个系列实验涉及Ar，N 2和CO 2，其在50至2400 mbar的压力下的效率和约15至135 mJ的入射激光能量。第二系列介绍了这种空中建模的有效性。所有实验均使用Nd：YAG激光在532 nm和4.23μm的聚焦半径下进行。