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Proceedings Paper

Photodisruption effects of laser-matter interaction in liquids
Author(s): Xiao Chen; Rongqing Xu; Zhonghua Shen; Jian Lu; Xiaowu Ni
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Paper Abstract

We investigated the interaction of a Nd: YAG laser with a sheet metal specimen as a model tissue film in the surrounding of water and air, respectively. By observation of scanning electronic microscopes (SEMs), the morphologies of laser-drilling holes in two mediums are quite different, which closely relates with their different interaction mechanisms. Furthermore, by means of optical beam deflection technique, it is obtained the transient force loading on a metal plate in water and air respectively during pulsed laser radiation. The experimental results are shown that in air the sample is only affected the laser-induced plasma ablation, while in water it is impacted not only ablation, but also two liquid-jet impulses due to bubbles collapse in the vicinity of a boundary. Both the amplitude and duration of three forces underwater are much larger than those in air. In addition, the first liquid-jet impact is obviously larger than laser ablation in water. So the mechanical action, especially the high-pressure liquid-jet impact loading on the sample’s surface in effect outweighs the well-known thermal effect or laser ablation in the pulsed laser medical surgery.

Paper Details

Date Published: 8 December 2003
PDF: 6 pages
Proc. SPIE 5254, Third International Conference on Photonics and Imaging in Biology and Medicine, (8 December 2003); doi: 10.1117/12.546206
Show Author Affiliations
Xiao Chen, Nanjing Univ. of Science and Technology (China)
Rongqing Xu, Nanjing Univ. of Science and Technology (China)
Zhonghua Shen, Nanjing Univ. of Science and Technology (China)
Jian Lu, Nanjing Univ. of Science and Technology (China)
Xiaowu Ni, Nanjing Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 5254:
Third International Conference on Photonics and Imaging in Biology and Medicine
Qingming Luo; Valery V. Tuchin; Min Gu; Lihong V. Wang, Editor(s)

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