Mr. Alexander A. Makoveichuk Profile

Alexander A. Makoveichuk

at Yuri Gagarin State Technical Univ of Saratov

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Proceedings Article | 29 April 2022 Paper

Frequency-modulated normal modes of electromagnetically induced transparency

Oleg Parshkov, Alexander Makoveichuk

Proceedings Volume 12193, 1219306 (2022) https://doi.org/10.1117/12.2623588

KEYWORDS: Frequency modulation, Fermium, Transparency, Polarization, Lead, Chemical species, Radio propagation, Modulation, Control systems, Telecommunications

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The theoretical results on the study of the evolution of electromagnetically induced transparency probe pulses with frequency modulation on the input surface of the active medium and possible frequency modulation of the control field are presented. It was shown that the presence of a sufficiently large frequency modulation of the input probe pulse (an instantaneous frequency offset of the order of an inhomogeneous line width resonant with the probe field) does not lead to the mode structure destruction of this field inside the active medium. At the same time, the transparency of the medium for the probe field is noticeably reduced, but it remains quite large. With frequency modulation of the control radiation, the mode regime of the probe field propagation is realized at least as long as the deviation of the frequency of the control field is less than half the width of the line of the probe quantum transition. However, the transparency of the medium for the probe field decreases in comparison with the case of the absence of frequency modulation. The analysis is carried out for the Ʌ-scheme of inhomogeneously broadened quantum transitions between the ³P₀, ³P⁰₁ and ³P₂ levels of the ²⁰⁸Pb isotope.

Proceedings Article | 4 May 2021 Paper

Electromagnetically induced transparency of powerful probe pulses

Oleg Parshkov, Alexander Makoveichuk

Proceedings Volume 11846, 118460U (2021) https://doi.org/10.1117/12.2584945

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The results of a theoretical study of the evolution of powerful elliptically polarized probe nanosecond pulses of electromagnetically induced transparency are presented. The analysis was carried out for the Ʌ-scheme of inhomogeneously broadened quantum transitions between degenerate levels of the²⁰⁸Pb isotope. The cases of resonance and quasiresonance are considered under the assumption that the input probe and control radiation have no phase modulation. It is shown that at a higher power of the input probe radiation, the pulses, into which it decays in the medium, are not pulses of normal modes, but their polarization characteristics fluctuate around the values inherent in normal modes, arising at a weak input probe radiation. In the case of a powerful input probe pulse, the phase modulation of the probe field is present at all stages of its propagation in the medium. It is shown that with an increase in the intensity of the input probe radiation, the transparency of the medium for the probe field decreases. However, it is large enough if the polarization characteristics of the input probe radiation coincide with those for normal modes of the parallel type.

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