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

Grigory Toker, Valery Bulatov, Tatiana Kovalchuk, Israel Schechter*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)244-248
Number of pages5
JournalChemical Physics Letters
Volume471
Issue number4-6
DOIs
StatePublished - 26 Mar 2009
Externally publishedYes

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