An Experimental Study on Micro-Bubble Generation by Laser-Induced Breakdown in Water
An Experimental Study on Micro-Bubble Generation by Laser-Induced Breakdown in Water
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水中激光诱导击穿产生微气泡的实验研究
DOI：
10.2184/lsj.36.1273
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
S. Yamaguchi
中科院分区：
文献类型：
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作者：
T. Yasuda;N. Takahashi;Masafumi Baba;K. Tei;S. Yamaguchi
本文对激光在水中击穿产生的不同直径气泡进行了详细的实验研究，这是激光医疗领域的重要课题。通过266-1064 nm的脉冲Nd：YAG激光产生气泡，并通过CCD相机测量气泡的尺寸。用门控ICCD相机进行的时间分辨测量揭示了激光击穿后气泡形成的过程。我们能够实现单个气泡生成的操作，所需的气泡直径范围为10至200 µm。气泡尺寸可以稳定地控制为注入水中的激光能量的函数，其在0.5 mJ和12 mJ之间变化。更有趣的是，注入的能量可以形成单个气泡或多个气泡，能量超过8 mJ，可能是由于过量的热量注入水中。这些结果显示了产生任意尺寸的纳米气泡或微气泡的潜力。
This paper reports a detailed experimental investigation of bubbles with various diameters generated by laser-induced breakdown in water, which is an important issue in the field of laser medical care. The bubbles were generated by a pulsed Nd:YAG laser at 266-1064 nm, and the sizes of the bubbles were measured by a CCD camera. A time-resolved measurement with a gated ICCD camera revealed the process of bubble formation after laser breakdown. We were able to achieve manipulation of single bubble generation with desired bubble diameter ranging from 10 to 200 µm. The bubble size could be stably controlled as a function of the injected laser energy into water, which varied between 0.5 mJ and 12 mJ. More interestingly, the injected energy can form either a single bubble or multiple bubbles, with an energy more than 8 mJ, probably due to excess heat injection into the water. These results show the potential for generating nano-bubbles or micro-bubbles of arbitrary size.