Towards industrial ultrafast laser microwelding: SiO2 and BK7 to aluminum alloy

Richard Carter, Michael Troughton, Jianyong Chen, Ian Elder, Robert R. Thomson, Matthew Jan Daniel Esser, Robert A. Lamb, Duncan Paul Hand

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)
162 Downloads (Pure)


We report systematic analysis and comparison of ps-laser microwelding of industry relevant Al6082 parts to SiO2 and BK7. Parameter mapping of pulse energy and focal depth on the weld strength is presented. The welding process was found to be strongly dependent on the focal plane but has a large tolerance to variation in pulse energy. Accelerated lifetime tests by thermal cycling from −50° to +90°C are presented. Welds in Al6082-BK7 parts survive over the full temperature range where the ratio of thermal expansion coefficients is 3.4:1. Welds in Al6082-SiO2 parts (ratio 47.1:1) survive only a limited temperature range.
Original languageEnglish
Pages (from-to)4873-4881
JournalApplied Optics
Issue number16
Publication statusPublished - 1 Jun 2017


  • Ultrafast
  • Picosecond
  • Laser
  • Welding
  • Micro-fabrication
  • Manufacturing


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