Micro-dynamics of optical breakdown in water induced by nanosecond laser pulses of 1064 nm wavelength

被引：21

作者：

Toker, Grigory ^{[1
]}

Bulatov, Valery ^{[1
]}

Kovalchuk, Tatiana ^{[1
]}

Schechter, Israel ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Dept Chem, IL-32000 Haifa, Israel

来源：

CHEMICAL PHYSICS LETTERS | 2009年 / 471卷 / 4-6期

关键词：

PICOSECOND;

D O I：

10.1016/j.cplett.2009.02.044

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Optical breakdown in water induced by 1064 nm Nd:YAG laser was visualized and measured by applying shadow and Schlieren optical diagnostic techniques. The research was focused on the earlier stages of the breakdown process, just after the end of the heating laser pulse. The spatial characteristics of laser spark columns were measured and compared to numerical analysis of cavities arising over inclusions. Anomalously long laser spark columns were observed. The distribution of cavity dimensions and energies absorbed in the spark were measured along the laser spark column. A novel non-probability based criterion for laser breakdown threshold was suggested, namely, the pulse energy which generates a spark of negligibly small length. (C) 2009 Elsevier B. V. All rights reserved.

引用

页码：244 / 248

页数：5

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