Ejection of glass rings during tightly focused femtosecond laser damage at a glass surface

Jeffrey F. Herbstman; Steven M. Yalisove; Alan J. Hunt

doi:10.1117/12.804154

30 December 2008 Ejection of glass rings during tightly focused femtosecond laser damage at a glass surface

Jeffrey F. Herbstman, Steven M. Yalisove, Alan J. Hunt

Proceedings Volume 7132, Laser-Induced Damage in Optical Materials: 2008; 713208 (2008) https://doi.org/10.1117/12.804154
Event: Boulder Damage Symposium XL Annual Symposium on Optical Materials for High Power Lasers, 2008, Boulder, Colorado, United States

Abstract

We observe a discontinuity in the scaling between the size of damage and the pulse energy for femtosecond laser pulses tightly focused at a glass surface. This discontinuity corresponds to the threshold for formation and ejection of rings of material surrounding the focus center. The mechanism for the generation of these structures appears distinct from that of the central holes and is ascribed to subsurface absorption leading to thermal expansion and shock wave formation.

Citation Download Citation

Jeffrey F. Herbstman, Steven M. Yalisove, and Alan J. Hunt "Ejection of glass rings during tightly focused femtosecond laser damage at a glass surface", Proc. SPIE 7132, Laser-Induced Damage in Optical Materials: 2008, 713208 (30 December 2008); https://doi.org/10.1117/12.804154

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