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Proceedings Paper

High-aspect ratio damage and modification in transparent materials by tailored focusing of femtosecond lasers
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Paper Abstract

We discuss studies of laser damage inside various transparent materials (glasses, polymers, sapphire, diamond) caused by femtosecond lasers at 515, 800, and 1030 nm, with nJ to mJ pulse energies, single-shot to 2 MHz repetition rates, single and 10 ns burst-mode pulses, chirped pulses, and linear, circular, and radial beam polarizations. Experiments have created high-aspect damage features and voids using aberration-controlled focusing, axicon-formed Bessel beams with <1 μm diameter central lobes extending hundreds of microns through the materials, and tightly focused lines (~1 μm × <100 μm). Mechanisms include self-focusing, filamentation, and material expansion/compaction and expulsion.

Paper Details

Date Published: 20 November 2019
PDF: 12 pages
Proc. SPIE 11173, Laser-induced Damage in Optical Materials 2019, 111730D (20 November 2019); doi: 10.1117/12.2536450
Show Author Affiliations
Brian K. Canfield, The Univ. of Tennessee Space Institute (United States)
Alexander Terekhov, The Univ. of Tennessee Space Institute (United States)
Lino Costa, The Univ. of Tennessee Space Institute (United States)
Lloyd M. Davis, The Univ. of Tennessee Space Institute (United States)
Univ. of Tennessee Knoxville (United States)


Published in SPIE Proceedings Vol. 11173:
Laser-induced Damage in Optical Materials 2019
Christopher Wren Carr; Vitaly E. Gruzdev; Detlev Ristau; Carmen S. Menoni, Editor(s)

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