Gulina, Y.; Zhu, J.; Krasin, G.; Kuzmin, E.; Kudryashov, S. Numerical Aperture-Dependent Spatial Scaling of Plasma Channels in HPHT Diamond. Photonics2023, 10, 1177.
Gulina, Y.; Zhu, J.; Krasin, G.; Kuzmin, E.; Kudryashov, S. Numerical Aperture-Dependent Spatial Scaling of Plasma Channels in HPHT Diamond. Photonics 2023, 10, 1177.
Gulina, Y.; Zhu, J.; Krasin, G.; Kuzmin, E.; Kudryashov, S. Numerical Aperture-Dependent Spatial Scaling of Plasma Channels in HPHT Diamond. Photonics2023, 10, 1177.
Gulina, Y.; Zhu, J.; Krasin, G.; Kuzmin, E.; Kudryashov, S. Numerical Aperture-Dependent Spatial Scaling of Plasma Channels in HPHT Diamond. Photonics 2023, 10, 1177.
Abstract
The investigation of plasma channels induced by focused ultra-short 1030-nm laser pulses in bulk of synthetic HPHT diamond revealed strong dependence of their size and shape on the used numerical aperture of the lens (NA=0.15-0.45). It was shown that at loose focusing conditions, it is possible to significantly increase the length of the plasma channel with a slight increase in pulse power, while tight focusing allows to obtain more compact structures in the same range of used powers. Such dependence paves the way to new possibilities in 3D processing of transparent dielectrics, allowing, for example, to vary the spatial parameters of modified regions without changing the setup, but only by controlling the lens aperture, which seems very promising for industrial applications.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
