Method for determination of the volume of material ejected as molten droplets during visible nanosecond ablation

Jennifer M. Fishburn, Michael J. Withford, David W. Coutts, James A. Piper

Research output: Contribution to journalArticleResearchpeer-review

Abstract

A novel method is presented for determining the volume of molten material ejected from a substrate as a result of visible pulsed-laser ablation. A 100-μm-wide pulsed-laser light sheet (τ ∼ 5 ns, λ. = 532 nm) was used in conjunction with a CCD camera to provide high-speed cross-sectional images of single-pulse ablation of aluminum with a visible nanosecond laser source. Computational analysis of the two-dimensional gray-scale images was used to determine the total volume of material ejected from the substrate in the form of molten droplets. Ablation with dual-wavelength (511- and 578-nm) pulses of 30-ns duration was characterized under various fluence conditions (0-25 J cm-2), allowing a quantitative threshold for explosive melt ejection in aluminum to be established at ∼10 J cm-2. The temporal evolution of the ejected material showed that, for an incident fluence of ∼40 J cm-2, molten-droplet ejection commenced at ∼400 ns and ceased after ∼2 μs.

LanguageEnglish
Pages6473-6476
Number of pages4
JournalApplied Optics
Volume43
Issue number35
DOIs
Publication statusPublished - 10 Dec 2004

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Ablation
ejection
ablation
Molten materials
pulsed lasers
fluence
aluminum
Pulsed lasers
gray scale
pulses
CCD cameras
laser ablation
Aluminum
high speed
Laser ablation
Substrates
thresholds
Laser pulses
wavelengths
lasers

Bibliographical note

This paper was published in [Applied optics] and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-35-6473]. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

Cite this

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abstract = "A novel method is presented for determining the volume of molten material ejected from a substrate as a result of visible pulsed-laser ablation. A 100-μm-wide pulsed-laser light sheet (τ ∼ 5 ns, λ. = 532 nm) was used in conjunction with a CCD camera to provide high-speed cross-sectional images of single-pulse ablation of aluminum with a visible nanosecond laser source. Computational analysis of the two-dimensional gray-scale images was used to determine the total volume of material ejected from the substrate in the form of molten droplets. Ablation with dual-wavelength (511- and 578-nm) pulses of 30-ns duration was characterized under various fluence conditions (0-25 J cm-2), allowing a quantitative threshold for explosive melt ejection in aluminum to be established at ∼10 J cm-2. The temporal evolution of the ejected material showed that, for an incident fluence of ∼40 J cm-2, molten-droplet ejection commenced at ∼400 ns and ceased after ∼2 μs.",
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Method for determination of the volume of material ejected as molten droplets during visible nanosecond ablation. / Fishburn, Jennifer M.; Withford, Michael J.; Coutts, David W.; Piper, James A.

In: Applied Optics, Vol. 43, No. 35, 10.12.2004, p. 6473-6476.

Research output: Contribution to journalArticleResearchpeer-review

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