arXiv subjects

E. S. Sunchugasheva

Publications and source records attributed to E. S. Sunchugasheva.

3 recordsLinked to original sources

arXiv2017

Influence of dispersion stretching of ultrashort UV laser pulse on the critical power of self-focusing

The critical power of self-focusing in the air for ultrashort UV laser pulses stretched due to dispersion from 90 up to 730 fs was experimentally measured. It was shown that the pulse duration enhancement due to its propagation in condensed media within above mentioned time-range leads to almost linear decrease of self-focusing critical power. It was also observed that when the pulse peak power exceeds the critical one, the maximum of linear plasma distribution along the UV laser filament does not shifted in the direction opposite to the laser pulse propagation as in the case of IR laser filament, but remains at the geometrical focus.

physics.optics↗

arXiv2015

Spectroscopy based on target luminescence caused by interaction with ultrashort UV laser pulses

We proposed remote spectroscopy approach consisted in luminescence light utilization. During interaction with different targets ultrashort UV laser pulse generates broadband spectrum light, which can be applied for remote spectroscopy purposes. We selected appropriate target materials to cover required spectral range from 300 to 600 nm and provided an example of spectrum reconstruction of known material. Obtained spectra are in a good correlation with calculated ones.

physics.optics↗

arXiv2013

Plasma channels under filamentation of infrared and ultraviolet double femtosecond laser pulses

An influence of plasma channel created by a filament of focused UV or IR femtosecond laser pulse (λ=248 nm or 740 nm) on characteristics of other plasma channel formed by a femtosecond pulse at the same wavelength following the first one with varied nanosecond time delay was experimentally studied. A dependence of optical transparency of the first channel and plasma density of the second channel on the time delay was demonstrated to be quite different for such a double UV and IR femtosecond pulses.

physics.optics↗