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Volume 1 Issue 4
Dec.  2019
Article Contents

Cvecek K, Dehmel S, Miyamoto I, Schmidt M. A review on glass welding by ultra-short laser pulses. Int. J. Extrem. Manuf. 1, 042001 (2019).
Citation: Cvecek K, Dehmel S, Miyamoto I, Schmidt M. A review on glass welding by ultra-short laser pulses. Int. J. Extrem. Manuf. 1, 042001 (2019).

A review on glass welding by ultra-short laser pulses


doi: 10.1088/2631-7990/ab55f6
More Information
  • Publish Date: 2019-12-19
  • Due to its physical properties and availability, glass is a highly appealing material for a variety of optical and technological systems. However, in order to realize complex glass geometries orhermetically sealed enclosures, applicable joining technologies are required. For the production of high performance parts, classical joining technologies, introducing additional material within the joint area, are not ideal since the joint affects the local physical properties. Alternatives require high processing time and a global thermal cycling of the material itself. Within the present paper, we provide an overview on the current state of research of ultra-short pulsed (USP) laser-based joining of glass, a joining technology both eliminating the need for additional material and long processing times with a global thermal cycling of the part. The joints are typically formed in glass that is transparent to the laser by exploiting nonlinear absorption effects that occur under extreme conditions. Though the temperature reached during the process is on the order of a few 1000 °C, the heat affected zone (HAZ) is confined to only tens of micrometers. It is this controlled confinement of the HAZ during the joining process that makes this technology so appealing to a multitude of applications because it allows the foregoing of a subsequent tempering step that is typically essential in other glass joining techniques, thus making it possible to effectively join highly heat sensitive components.
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A review on glass welding by ultra-short laser pulses

doi: 10.1088/2631-7990/ab55f6
  • 1 Institute of Photonic Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany;
  • 2 SAOT—Erlangen Graduate School in Advanced Optical Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany;
  • 3 blz—Bayerisches Laserzentrum GmbH, Erlangen, Germany;
  • 4 Osaka University, Osaka, Japan

Abstract: 

Due to its physical properties and availability, glass is a highly appealing material for a variety of optical and technological systems. However, in order to realize complex glass geometries orhermetically sealed enclosures, applicable joining technologies are required. For the production of high performance parts, classical joining technologies, introducing additional material within the joint area, are not ideal since the joint affects the local physical properties. Alternatives require high processing time and a global thermal cycling of the material itself. Within the present paper, we provide an overview on the current state of research of ultra-short pulsed (USP) laser-based joining of glass, a joining technology both eliminating the need for additional material and long processing times with a global thermal cycling of the part. The joints are typically formed in glass that is transparent to the laser by exploiting nonlinear absorption effects that occur under extreme conditions. Though the temperature reached during the process is on the order of a few 1000 °C, the heat affected zone (HAZ) is confined to only tens of micrometers. It is this controlled confinement of the HAZ during the joining process that makes this technology so appealing to a multitude of applications because it allows the foregoing of a subsequent tempering step that is typically essential in other glass joining techniques, thus making it possible to effectively join highly heat sensitive components.

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