Abstract

We present a high-power femtosecond GHz burst laser with nonlinear frequency conversion to the ultraviolet spectral region. An average power as high as 20-W at 343nm wavelength has been obtained after third harmonic generation of a 100-W, 480-fs GHz burst mode femtosecond laser at 1030nm. This is to our knowledge the first demonstration of a high-power ultraviolet femtosecond laser with GHz bursts. GHz femtosecond lasers have recently revealed significant interest for micro-machining applications, in particular by showing substantially increased ablation efficiencies on different materials [1, 2]. Frequency conversion to the ultraviolet spectral region is highly interesting for spatial and chemical selectivity in multi-material or multi-layer material processing, especially for materials containing organic components. Our high-power UV femtosecond GHz burst laser is therefore promising for high efficiency and high-quality laser processing of polymer-based materials with low heat affected zones.

© 2019 IEEE

PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription