Tomskiy gosudarstvennyy universitet
UDC 537.523
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 fluorescence pattern of rhodamine 6G from a liquid aerosol was studied experimentally with varying concentration of the fluorophore irradiated by nanosecond laser pulses with a wavelength of 1.06 μm. A dependence of the fluorescence signal in the “backward” direction on the concentration of R6G molecules was found: with an increase in the fluorophore concentration from 10-2% to 5% in an ethanol solution, a decrease in the fluorescence intensity by almost two times is observed for both single-photon-excited fluorescence and two-photon fluorescence. The fluorescence signal increases with increasing pump energy. At high dye concentrations, signal saturation with increasing pump energy is observed for single-photon excited fluorescence. For two-photon fluorescence, the energy dependence is preserved even at high concentrations. The dependence of the fluorescence radiation pattern shape at different dye concentrations and pump energies is established.
fluorescence, liquid-drop aerosol, laser radiation, nanosecond pulse
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