Evaluation of molten zone in micro-welding of glass by picosecond pulsed laser

Yasuhiro Okamoto, Isamu Miyamoto, Kristian Cvecek, Akira Okada, Kenta Takahashi, Michael Schmidt

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Glass materials have been widely used in optics, MEMS, electronics and biomedical applica-tions because of their excellent optical, mechanical and chemical properties. Fusion welding by ul-trashort pulsed laser has been proposed as a promising technique for glass joining, since joining can be accomplished without an intermediate layer and mechanical contact. However, to apply a fusion welding technique by ultrashort pulsed laser as a reliable joining method, it is important to under-stand the mechanical properties of the weld seam since glass materials are very sensitive to tempera-ture gradients. Therefore, a method of evaluating the weld seam in the fusion welding of glass by picosecond pulsed laser was discussed, and its mechanical strength was investigated. A larger opti-cal contact area had a great influence on the shear load of the weld seam, while a smaller optical contact area could reduce the influence of the contact area on the measurement of shear load. There-fore, it was important to reduce the optical contact area to accurately evaluate the shearing strength of weld seam. The mechanical strength of the weld seam reduced at a low pulse repetition rate. High bending strength and shear stress could be obtained at a proper pulse repetition rate.

Original languageEnglish
Pages (from-to)65-69
Number of pages5
JournalJournal of Laser Micro Nanoengineering
Volume8
Issue number1
DOIs
Publication statusPublished - Jan 2013

Fingerprint

Pulsed lasers
welding
fusion welding
Molten materials
pulsed lasers
Welding
Welds
Glass
evaluation
glass
Joining
Pulse repetition rate
Fusion reactions
pulse repetition rate
Strength of materials
ultrashort pulsed lasers
mechanical properties
shear
Mechanical properties
flexural strength

Keywords

  • Bending strength
  • Glass
  • Micro-welding
  • Optical contact
  • Picosecond laser
  • Shear stress
  • Ultrashort pulsed laser

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Instrumentation
  • Electrical and Electronic Engineering

Cite this

Evaluation of molten zone in micro-welding of glass by picosecond pulsed laser. / Okamoto, Yasuhiro; Miyamoto, Isamu; Cvecek, Kristian; Okada, Akira; Takahashi, Kenta; Schmidt, Michael.

In: Journal of Laser Micro Nanoengineering, Vol. 8, No. 1, 01.2013, p. 65-69.

Research output: Contribution to journalArticle

Okamoto, Yasuhiro ; Miyamoto, Isamu ; Cvecek, Kristian ; Okada, Akira ; Takahashi, Kenta ; Schmidt, Michael. / Evaluation of molten zone in micro-welding of glass by picosecond pulsed laser. In: Journal of Laser Micro Nanoengineering. 2013 ; Vol. 8, No. 1. pp. 65-69.
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