Photoacoustic shock wave emission and cavitation from structured optical fiber tips
Photoacoustic shock wave emission and cavitation from structured optical fiber tips
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DOI：
10.1063/1.4939511
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发表时间：
2016-01-11
影响因子：
4
通讯作者：
Ohl, C. D.
中科院分区：
文献类型：
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作者：
Mohammadzadeh, M.;Gonzalez-Avila, S. R.;Ohl, C. D.
在光纤尖端产生的光声波由压缩冲击波和拉伸衍射波组成。这些拉伸波沿纤维轴沿着重叠并形成空化气泡云。我们证明，通过微加工成形的纤维尖端改变的数量和方向的发射波和空化云。从五个不同形状的纤维尖端的冲击波发射和空化模式进行了实验研究，并比较线性波传播模型。特别是，多个冲击波发射和产生强张力远离纤维轴已实现使用修改后的纤维尖端。这些改变的波形可以通过利用气泡-冲击波相互作用而应用于新型显微手术方案，诸如基于纤维的组织摧毁术。(C)2016 AIP Publishing LLC.
Photoacoustic waves generated at the tip of an optical fiber consist of a compressive shock wave followed by tensile diffraction waves. These tensile waves overlap along the fiber axis and form a cloud of cavitation bubbles. We demonstrate that shaping the fiber tip through micromachining alters the number and direction of the emitted waves and cavitation clouds. Shock wave emission and cavitation patterns from five distinctively shaped fiber tips have been studied experimentally and compared to a linear wave propagation model. In particular, multiple shock wave emission and generation of strong tension away from the fiber axis have been realized using modified fiber tips. These altered waveforms may be applied for novel microsurgery protocols, such as fiber-based histotripsy, by utilizing bubble-shock wave interaction. (C) 2016 AIP Publishing LLC.