Femtosecond laser pulses were focused on the interface of two glass specimens. Proper use of optical and laser processing parameters enables transmission welding. The morphology of the weld cross section was studied using differential interference contrast optical microscopy. In addition, a numerical model was developed to predict the absorption volumes of femtosecond laser pulses inside a transparent material. The model takes into account the temporal and spatial characteristics and propagation properties of the laser beam, and the transmission welding widths were subsequently compared with the absorption widths predicted by the model. The model can lead to the achievement of a desirable weld shape through understanding the effects of laser pulse energy and numerical aperture on the shape of the absorption volume. The changes in mechanical properties of the weld seams were studied through spatially resolved nanoindentation, and indentation fracture analysis was used to investigate the strength of the weld seams.
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e-mail: pk2261@columbia.edu
e-mail: gs2358@columbia.edu
e-mail: yly1@columbia.edu
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February 2012
Research Papers
Transmission Welding of Glass by Femtosecond Laser: Mechanism and Fracture Strength
Panjawat Kongsuwan,
Panjawat Kongsuwan
Graduate Student
Department of Mechanical Engineering,
e-mail: pk2261@columbia.edu
Columbia University
, New York, NY 10027
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Gen Satoh,
Gen Satoh
Research Assistant
Department of Mechanical Engineering,
e-mail: gs2358@columbia.edu
Columbia University
, New York, NY 10027
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Y. Lawrence Yao
Y. Lawrence Yao
Professor
Manufacturing Research Laboratory, Department of Mechanical Engineering,
e-mail: yly1@columbia.edu
Columbia University
, New York, NY 10027
Search for other works by this author on:
Panjawat Kongsuwan
Graduate Student
Department of Mechanical Engineering,
Columbia University
, New York, NY 10027e-mail: pk2261@columbia.edu
Gen Satoh
Research Assistant
Department of Mechanical Engineering,
Columbia University
, New York, NY 10027e-mail: gs2358@columbia.edu
Y. Lawrence Yao
Professor
Manufacturing Research Laboratory, Department of Mechanical Engineering,
Columbia University
, New York, NY 10027e-mail: yly1@columbia.edu
J. Manuf. Sci. Eng. Feb 2012, 134(1): 011004 (11 pages)
Published Online: January 11, 2012
Article history
Received:
April 1, 2011
Revised:
September 30, 2011
Online:
January 11, 2012
Published:
January 11, 2012
Citation
Kongsuwan, P., Satoh, G., and Yao, Y. L. (January 11, 2012). "Transmission Welding of Glass by Femtosecond Laser: Mechanism and Fracture Strength." ASME. J. Manuf. Sci. Eng. February 2012; 134(1): 011004. https://doi.org/10.1115/1.4005306
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