Investigation on Luminescence near Focal Point during Ultrafast Laser Microwelding of Glass Substrates

In this study, we investigate luminescence near focal point during ultrafast laser micro welding in order to find the optimal processing position for sealing of two glass substrates. To quantitatively analyze the emission near the focal point during ultrafast laser microwelding, the focal position w...

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Bibliographic Details
Published inJournal of laser micro nanoengineering Vol. 19; no. 2; pp. 145 - 150
Main Authors Fujiwara, Junpei, Okuno, Hikari, Sasahara, Taiga, Ota, Takao, Watanabe, Wataru, Tamaki, Takayuki
Format Journal Article
LanguageEnglish
Published Ibaraki Reza Netsu Kako Kenkyukai 01.09.2024
Subjects
Emission analysis
Experimental methods
Experiments
Glass substrates
Laser beam welding
Lasers
Light
Luminescence
Microwelding
Plasma
Research methodology
Ultrafast lasers
Velocity
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Summary:In this study, we investigate luminescence near focal point during ultrafast laser micro welding in order to find the optimal processing position for sealing of two glass substrates. To quantitatively analyze the emission near the focal point during ultrafast laser microwelding, the focal position was shifted vertically by 0.01 mm increments from the boundary surface of the glass substrates. In addition, we extracted video frames at intervals of 0.1 seconds during processing and displayed the emission images near the focal point by decomposing them into the color components of RGB. As a result, the welding status can be determined based on the temporal changes in luminescence at each focal point position. Furthermore, it was found that the changes in the RGB components were largely influenced by the air between the glass substrates.
ISSN:1880-0688
DOI:10.2961/ilmn.2024.02.2009