Wavelength Dependence of IR Laser for Dual-laser Shattering of a Water Microdroplet

For the single- and dual-laser shattering of water microdroplets, the wavelength dependence of an infrared (IR) laser was experimentally examined in the range 2.25–3.75 µm using ion current measurements coupled with time-resolved imaging. Compared to a single IR laser, simultaneous illumination by d...

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Bibliographic Details
Published in:Chemistry letters 2012-11, Vol.41 (11), p.1481-1483
Main Authors: Sugiyama, Akinori, Nakajima, Atsushi
Format: Article
Language:English
Subjects:
Fragmentation
Infrared
Infrared radiation
Lasers
Spatial distribution
Vibration
Water
Wavelengths
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Summary:For the single- and dual-laser shattering of water microdroplets, the wavelength dependence of an infrared (IR) laser was experimentally examined in the range 2.25–3.75 µm using ion current measurements coupled with time-resolved imaging. Compared to a single IR laser, simultaneous illumination by dual IR lasers effectively compresses the spatial distribution of small fragments around the absorption maximum for the OH-stretching vibration of liquid water (λ = 2.75–3.25 µm). The effect can be explained by the small penetration depth of the IR laser toward water microdroplets.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.2012.1481