A simplified theoretical model that describes the formation of a gas bubble on a light-absorbing microinclusion in liquid during laser irradiation is presented. The experimental results of irradiation of agglomerates of carbon black nanoparticles with nanosecond laser pulses in distilled water and aqueous solution of glycerol are obtained. The satisfactory correspondence between the experimental and theoretical results is achieved at low values of the microinclusion light absorptivity and can be associated with additional light scattering caused both by the formation of the gas bubble during the laser pulse action and by the phenomenon of critical opalescence in the superheated liquid. With the increase in the laser fluence against the background of the formation of the small-sized gas bubbles, the large-sized gas bubbles appear, which qualitatively agrees with the dependence of gas bubble size on the laser fluence. In case of multipulse laser irradiation, heat accumulation contributes to more uniform distribution of the gas bubbles’ size. The investigated regularities can be used for optimization of the laser parameters in biomedical and other laser applications.

中文翻译：

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激光辐照过程中液体中光吸收性微夹杂物的气泡形成分析：实验和理论研究

提出了一个简化的理论模型，该模型描述了在激光辐照期间液体中的吸光性微内含物上形成气泡的过程。获得了在蒸馏水和甘油水溶液中用纳秒激光脉冲辐照炭黑纳米颗粒附聚物的实验结果。实验结果和理论结果之间令人满意的对应关系是在微夹杂物的光吸收率较低的情况下实现的，并且可能与激光脉冲作用期间气泡形成以及玻璃中的临界乳白色现象引起的额外光散射有关。过热的液体。随着在小气泡形成背景下激光通量的增加，出现了大气泡，在质量上与气泡大小对激光通量的依赖关系一致。在多脉冲激光辐照的情况下，热量积聚有助于气泡尺寸的更均匀分布。研究的规律性可用于优化生物医学和其他激光应用中的激光参数。