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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 10 — May. 10, 2010
  • pp: 10642–10649

Dynamics of material modifications following laser-breakdown in bulk fused silica

R. A. Negres, M. D. Feit, and S. G. Demos  »View Author Affiliations

Optics Express, Vol. 18, Issue 10, pp. 10642-10649 (2010)

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We report on the material response during the cooling phase in bulk fused silica following localized energy deposition via laser-induced breakdown. We use a time-resolved microscope system to acquire images of the region of energy deposition at delay times covering the entire timeline of events. In addition, this system is configured to perform pump-and-probe damage testing measurements to investigate the evolution of the transient absorption of the modified material. The main features of a damage site are established at ~30 ns after the pump pulse, i.e. cracks reach their final size within this time frame. The results reveal that the cracks and melted core exhibit a transient absorption up until about 300 ns and 200 μs delay times, respectively, and suggest that the melted region returns to solid phase at ~70 ms delay.

© 2010 Optical Society of America

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(140.3440) Lasers and laser optics : Laser-induced breakdown
(170.6920) Medical optics and biotechnology : Time-resolved imaging

ToC Category:
Lasers and Laser Optics

Original Manuscript: March 16, 2010
Revised Manuscript: April 27, 2010
Manuscript Accepted: May 2, 2010
Published: May 6, 2010

R. A. Negres, M. D. Feit, and S. G. Demos, "Dynamics of material modifications following laser-breakdown in bulk fused silica," Opt. Express 18, 10642-10649 (2010)

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