Main > Chinese Journal of Lasers >  Volume 47 >  Issue 9 >  Page 0902005 > Article
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  • Received: Mar. 24, 2020

    Accepted: May. 8, 2020

    Posted: Sep. 1, 2020

    Published Online: Sep. 16, 2020

    The Author Email: Huang Ting (huangting@bjut.edu.cn)

    DOI: 10.3788/CJL202047.0902005

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    Miao Yu, Ting Huang, Rongshi Xiao. Long Focal Length Green Femtosecond Laser Welding of Glass[J]. Chinese Journal of Lasers, 2020, 47(9): 0902005

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Chinese Journal of Lasers, Vol. 47, Issue 9, 0902005 (2020)

Long Focal Length Green Femtosecond Laser Welding of Glass

Yu Miao, Huang Ting*, and Xiao Rongshi

Author Affiliations

  • High-Power and Ultrafast Laser Manufacturing Lab, Institute of Laser Engineering, Beijing University of Technology,Beijing 100124, China

Abstract

In ultrafast laser glass welding, the laser beam is usually focused by a large numerical aperture micro objective lens. The welding is strictly limited to a very small focal volume with short working distance, low welding speed, and narrow weld width, which limit its industrial applications. In this work, a 75 W green femtosecond laser equipped with a 255 mm-long focal scanning galvanometer was employed to achieve non-optical contact high-speed welding of display screen glasses. The effects of the focal position, pulse energy, and scanning speed on the weld formation were obtained, the welding process window was also obtained. An extremely high welding speed of 6 m/min was achieved without weld defects. In addition, the welds exhibited a shear strength of 20 MPa as well as good seal performance and transmittance, indicating that our method has a great prospect in industrial applications.

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