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5 March 2021 Ultrafast microwelding of glass by selective absorption of a continuous-wave laser into excited electrons
Shunya Yoshitake, Yusuke Ito, Naoyuki Miyamoto, Akihiro Shibata, Ikuo Nagasawa, Keisuke Nagato, Naohiko Sugita
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Proceedings Volume 11673, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXVI; 116730J (2021) https://doi.org/10.1117/12.2576852
Event: SPIE LASE, 2021, Online Only
Abstract
Glass-to-glass welding using ultrashort pulse laser is attracting attention. However, the low processing speed and the requirement of the small air gap between glass substrates have impeded its use in industry. In our study, we achieved rapid welding of glass substrates by coaxially focusing a single femtosecond laser pulse and a continuous-wave (CW) laser with a wavelength that transmits through glass. The selective absorption of the CW laser into the excited electrons increased the processing speed by a factor of 500 compared to the conventional method, while the allowable gap increased by a factor of 4.
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Shunya Yoshitake, Yusuke Ito, Naoyuki Miyamoto, Akihiro Shibata, Ikuo Nagasawa, Keisuke Nagato, and Naohiko Sugita "Ultrafast microwelding of glass by selective absorption of a continuous-wave laser into excited electrons", Proc. SPIE 11673, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXVI, 116730J (5 March 2021); https://doi.org/10.1117/12.2576852
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KEYWORDS
Glasses
Continuous wave operation
Absorption
Electrons
Ultrafast phenomena
Femtosecond phenomena
Pulsed laser operation
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