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Methods and systems for laser welding transparent materials with an ultrashort pulsed laser

  • US 8,314,359 B2
  • Filed: 10/16/2009
  • Issued: 11/20/2012
  • Est. Priority Date: 09/08/2005
  • Status: Active Grant
First Claim
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1. A method for welding materials, comprising:

  • focusing a beam of ultrashort laser pulses near an interface between said materials, at least one of said materials being transparent at a wavelength of said ultrashort pulses; and

    producing said ultrashort laser pulses at a repetition rate in the range from 100 kHz to 100 MHz, and with one or more zones of fluence sufficient to induce localized melting of said materials at said interface without ablation of said materials, said ultrashort pulses providing a fluence of more than about 0.01 J/cm2 in said one or more zones, and intensity sufficient to cause non-linear absorption within said materials, wherein a pulse to pulse temporal spacing corresponding to said repetition rate in said range is sufficiently small to cause accumulation of heat in said materials so as to induce said localized melting at said interface.

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