The dynamics of the formation and relaxation of microbubbles in a polyacrylamide phantom of tattooed skin under the action of a series of laser pulses with 15-ns duration is studied. It is shown that the growth of microbubbles occurs within a few milliseconds, and their lifetime varies from several seconds to several hours, depending on the water content in the phantom and the fluence (energy density) of laser radiation. It is found that the multipulse laser exposure regime, in comparison with the single-pulse regime, reduces the laser radiation fluence and significantly increases the degree of phantom bleaching. A region of parameters (number of pulses, fluence), in which a high concentration of undesirable (blocking laser radiation) long-lived bubbles does not form, while the bleaching effect reaches its maximum, is found. A mechanism for effective tattoo removal, based on selective thermolysis under conditions of a decrease in the thermal conductivity of the medium in the immediate vicinity of pigmented particles due to the formation of microbubbles, is proposed.

研究了在一系列持续时间为 15 ns 的激光脉冲的作用下，纹身皮肤的聚丙烯酰胺模型中微泡的形成和松弛动力学。结果表明，微气泡的生长发生在几毫秒内，其寿命从几秒到几小时不等，具体取决于模型中的水含量和激光辐射的注量（能量密度）。结果表明，与单脉冲方案相比，多脉冲激光曝光方案降低了激光辐射能量密度并显着增加了幻影漂白的程度。发现了一个参数区域（脉冲数、能量密度），其中不形成高浓度的不希望的（阻挡激光辐射）长寿命气泡，而漂白效果达到最大值。