Petkovsek Rok, Mozina Janez, Mocnik Grisa
Opt Express. 2005 May 30;13(11):4107-12. doi: 10.1364/opex.13.004107.
Plasma and a cavitation bubble develop at the site of laser-induced breakdown in water. Their formation and the propagation of the shock wave were monitored by a beam-deflection probe and an arm-compensated interferometer. The interferometer part of the setup was used to determine the relative position of the laser-induced breakdown. The time-of-flight data from the breakdown site to the probe beam yielded the velocity, and from the velocity the shock-wave pressure amplitudes were calculated. Two regions were found where the pressure decays with different exponents, pointing to a strong attenuation mechanism in the initial phase of the shock-wave propagation.
在水中激光诱导击穿的位置会产生等离子体和空化气泡。通过光束偏转探头和臂补偿干涉仪监测它们的形成以及冲击波的传播。该装置的干涉仪部分用于确定激光诱导击穿的相对位置。从击穿位置到探测光束的飞行时间数据得出速度，并根据速度计算冲击波压力振幅。发现有两个区域压力以不同指数衰减，这表明在冲击波传播的初始阶段存在强烈的衰减机制。
