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- W2525179660 abstract "A new experimental method is proposed to study the dynamics of nonlinear processes occurring upon two-photon interband picosecond excitation of a lead tungstate crystal and upon its excitation by cw probe radiation in a temporal range from several nanoseconds to several seconds. The method is applied to the case of crystal excitation by a sequence of 25 high-power picosecond pulses with a wavelength of and cw probe radiation. Measuring the probe beam transmittance during crystal excitation, one can investigate the influence of two-photon interband absorption and the thermal nonlinearity of the refractive index on the dynamics of nonlinear processes in a wide range of times (from several nanoseconds to several seconds). The time resolution of the measuring system makes it possible to distinguish fast and slow nonlinear processes of electronic or thermal nature, including the generation of a thermal lens and thermal diffusion. An alternative method is proposed to study the dynamics of induced absorption transformation and, therefore, the dynamics of the development of nonlinear rocesses upon degenerate two-photon excitation of the crystal in the absence of external probe radiation." @default.
- W2525179660 created "2016-10-07" @default.
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- W2525179660 date "2016-09-28" @default.
- W2525179660 modified "2023-09-24" @default.
- W2525179660 title "Nonlinear processes upon two-photon interband picosecond excitation of PbWO<sub>4</sub>crystal" @default.
- W2525179660 doi "https://doi.org/10.1070/qel16120" @default.
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