The nature of emission from optical breakdown induced by pulses of fs and ns duration

C. W. Carr, M. D. Feit, A. M. Rubenchik, P. Demange, S. Kucheyev, M. D. Shirk, H. B. Radousky, S. G. Demos

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

Spectral emission from optical breakdown in the bulk of a transparent dielectric contains information about the nature of the breakdown medium. We have made time resolved measurements of the breakdown induced emission caused by nanosecond and femtosecond infrared laser pulses. We previously demonstrated that the emission due to ns pulses is blackbody in nature allowing determination of the fireball temperature and pressure during and after the damage event. The emission due to femtosecond pulse breakdown is not blackbody in nature; two different spectral distributions being noted. In one case, the peak spectral distribution occurs at the second harmonic of the incident radiation, in the other the distribution is broader and flatter and presumably due to continuum generation. The differences between ns and fs breakdown emission can be explained by the differing breakdown region geometries for the two pulse durations. The possibility to use spectral emission as a diagnostic of the emission region morphology will be discussed.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsG.J. Exarhos, A.H. Guenther, N. Kaiser, K.L. Lewis, M.J. Soileau, C.J. Stolz
Pages494-500
Number of pages7
Volume5647
DOIs
StatePublished - 2005
Externally publishedYes
Event36th Annual Boulder Damage Symposium Proceedings: Laser-Induced Damage in Optical Materials: 2004 - Boulder, CO, United States
Duration: Sep 20 2004Sep 22 2004

Other

Other36th Annual Boulder Damage Symposium Proceedings: Laser-Induced Damage in Optical Materials: 2004
CountryUnited States
CityBoulder, CO
Period9/20/049/22/04

Keywords

  • DKDP
  • Emission
  • KDP
  • Laser-induced-damage

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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