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ID 57530
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Author
Ouyang, Zhiyong Graduate School of Natural Science and Technology, Okayama University
Okamoto, Yasuhiro Graduate School of Natural Science and Technology, Okayama University Kaken ID publons
Ogino, Yuta Graduate School of Natural Science and Technology, Okayama University
Sakagawa, Tomokazu
Okada, Akira Graduate School of Natural Science and Technology, Okayama University Kaken ID
Abstract
Focusing condition such as numerical aperture (N.A.) has a great influence on the creation of molten area and the stable welding process in fusion micro-welding of glass. In this study, a picosecond pulsed laser of 1064 nm in wavelength and 12.5 ps in pulse duration was tightly focused inside a borosilicate glass using objective lenses of numerical apertures 0.45, 0.65, and 0.85 with spherical aberration correction. Influence of numerical aperture on molten area formation was experimentally investigated through analysis of focusing situation in glass, and movement of absorption point, and then molten area characteristics were discussed. It is concluded that N.A. of 0.65 with superior focusing characteristics can form a large and continuous molten area without cracks, which enables achievement of stable joining of glass material by picosecond pulsed laser.
Keywords
ultrashort pulsed laser
glass material
absorption point
molten area
numerical aperture
Published Date
2019-03-03
Publication Title
Applied Sciences
Volume
volume9
Issue
issue7
Publisher
MDPI
Start Page
1412
Content Type
Journal Article
language
英語
OAI-PMH Set
岡山大学
Copyright Holders
© 2019 by the authors
File Version
publisher
DOI
Web of Science KeyUT
Related Url
isVersionOf https://doi.org/10.3390/app9071412
License
https://creativecommons.org/licenses/by/4.0/
Citation
Ouyang, Z.; Okamoto, Y.; Ogino, Y.; Sakagawa, T.; Okada, A. Influence of Numerical Aperture on Molten Area Formation in Fusion Micro-Welding of Glass by Picosecond Pulsed Laser. Appl. Sci. 2019, 9, 1412.
Funder Name
Japan Society for the Promotion of Science
助成番号
24760107