Abstract
When a femtosecond laser pulse is focused at the interface of two transparent substrates, localised melting and quenching of the two substrates occur around the focal volume, bridging them due to nonlinear absorption. The substrates can then be joined by resolidification of the materials. We investigate the optimum irradiation conditions needed to join borosilicate glass substrates and fused silica substrates using a 1 kHz 800 nm Ti:sapphire amplifier. We characterised the joint strength and the transmittance through joint volumes as a function of laser energy and translation velocity. We found that a joining strength as large as 14.9 MPa could be obtained in both fused silica and borosilicate glass. Annealing the joint samples led to an increase in the joint strength.
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42.65.Jx; 42.70.Ce; 81.20.Vj
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Watanabe, W., Onda, S., Tamaki, T. et al. Direct joining of glass substrates by 1 kHz femtosecond laser pulses. Appl. Phys. B 87, 85–89 (2007). https://doi.org/10.1007/s00340-006-2537-y
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DOI: https://doi.org/10.1007/s00340-006-2537-y