UDC 537.876.2
CSCSTI 29.33
Russian Classification of Professions by Education 03.03.02
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 6135
BISAC TEC019000 Lasers & Photonics
The report presents the results of experimental study of conditions for formation of a highly directional supercontinuum (HDS) in nitrogen gas when pumping by radiation pulse at wavelength of 950 nm with duration of 70 fs and energy of up to 7 mJ. The pumping radiation was focused into gas chamber by spherical mirror with F = 75 cm under aberration conditions (the incidence angle of radiation on the mirror was 150). It is shown that there is optimal pumping energy of 4.5 mJ and gas pressure of 3 atm. The HDS spectral composition covers the range from 350 to 1000 nm. The HDS radiation divergence is diffractive and for the entire white spot is ~ 1 mrad. The HDS maximum radiation energy was 17 µJ.
filament, supercontinuum, aberration focusing, radiation pulse, wavelength, divergence.
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