Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Bonding of glass with femtosecond laser pulses at high repetition rates

: Richter, S.; Döring, S.; Tünnermann, A.; Nolte, S.


Applied physics. A 103 (2011), No.2, pp.257-261
ISSN: 0340-3793
ISSN: 0721-7250
ISSN: 0947-8396 (Print)
ISSN: 1432-0630 (Online)
Journal Article
Fraunhofer IOF ()

We report on the welding of fused silica with ultrashort laser pulses at high repetition rates. Femtosecond laser pulses were focused at the interface of two optically contacted fused silica samples. Due to the nonlinear absorption in the focal volume and heat accumulation of successive pulses, the laser acts as a localized heat source at the focus position. Here, we analyze the influence of the laser and processing parameters on the amount of molten material. Moreover, we determine the achievable breaking stress by a three point bending test. With optimized parameters up to 75% of the breaking stress of the bulk material have been obtained.