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Journal of Biomedical Optics

Micropillar fabrication on bovine cortical bone by direct-write femtosecond laser ablation
Author(s): Y. C. Lim; Katrina Altman; David Forest Farson; Katharine Flores
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Paper Abstract

We investigated fabrication of cylindrical micropillars on bovine cortical bone using direct-write femtosecond laser ablation. The ablation threshold of the material was measured by single-pulse ablation tests, and the incubation coefficient was measured from linear scanned ablation tests. A motion system was programmed to apply multiple layers of concentric rings of pulses to machine pillars of various diameters and heights. The diameter of the top surface of the pillar was found to steadily decrease due to incubation of damage from successive layers of pulses during the machining process. Pillar top diameter was predicted based on a paraxial beam fluence approximation and single-pulse ablation threshold and incubation coefficient measurements. Pillar diameters predicted as successive layers of pulses were applied were well-matched to experiments, confirming that femtosecond laser ablation of the cortical bone was well-modeled by single-pulse ablation threshold measurements and an incubation coefficient.

Paper Details

Date Published: 1 November 2009
PDF: 10 pages
J. Biomed. Opt. 14(6) 064021 doi: 10.1117/1.3268444
Published in: Journal of Biomedical Optics Volume 14, Issue 6
Show Author Affiliations
Y. C. Lim, The Ohio State Univ. (United States)
Katrina Altman, The Ohio State Univ. (United States)
David Forest Farson, The Ohio State Univ. (United States)
Katharine Flores, The Ohio State Univ. (United States)

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