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Журнал прикладной спектроскопии

АЛГОРИТМЫ ПРЕОБРАЗОВАНИЯ ИНФОРМАЦИИ В ЭХО-ГОЛОГРАФИИ

Guzel I. Garnaeva, L. A. Nefedev, É. I. Khakimzyanova

Published Jan 1, 2018• 0 citations
OpenAlex

Abstract

The filtration of optical signals and the transformation of information using stimulated echo-holography in the case when its excitation occurs with the use of an object laser pulse carrying information and a pulse that acts as a frequency filter are considered. It is shown that the temporal form of the signal of the stimulated echo-hologram depends on the duration, amplitude, and area and time structure of the exciting pulses.

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ОПЕРАЦИЯ КОНЪЮНКЦИИ ДЛЯ СИГНАЛОВ В ОПТИЧЕСКОЙ ЭХО-ГОЛОГРАФИИ

L. A. Nefedev, Э. И. Низамова, Guzel I. Garnaeva

The implementation of logical operations on signals using stimulated echo-holography in the case when it is excited using an object laser pulse carrying information and a pulse acting as a frequency filter is considered. It is shown that the stimulated echo-hologram can be used to implement the conjunction operation.

Журнал прикладной спектроскопии•Mar 21, 2020•0 citations

Information losses when recording the stimulated echo-hologram in gas media

Е. Н. Ахмедшина, Leonid A. Nefediev, Guzel I. Garnaeva +1 more

Considered is the impact of collisions with the change of the particles velocity in the 174 Yb vapor exerted on the information reproducibility in the stimulated echo hologram response, encoded in the temporal form of the second object laser pulse. It was manifested that such collisions result in the increase of the "spurious" information, serving the background for loosing information introduced into the object laser pulse in the stimulated echo hologram response.

Journal of Physics Conference Series•Aug 1, 2018•0 citations

Information processes in optical echo holography

L. A. Nefedev, Inna Aleksandrovna Rusanova

A set-theoretical method for studying information processes in resonant media with phase memory is developed. The conversion of the classical information carried by the object laser pulse into the potential (structural) quantum information of the resonant medium that takes place during the recording of a phase echo hologram is studied. It is shown that a resonant medium with phase memory stores quantum information in the form of an information-phase grating (the distribution of qubits within the inhomogeneously broadened line of a resonant transition). The temporal evolution of this grating is studied as a function of the times of reversible and irreversible relaxation of the system.

Optics and Spectroscopy•Jun 1, 2001•5 citations

The Image Conversion in Optical Echo-Holography by External Electromagnetic Standing Waves

Guzel I. Garnaeva, Leonid A. Nefediev, А. Р. Сахбиева

The recording and playback of information using a reverse stimulated photon—echo hologram when exposed to the recording medium pulse of non-resonant electromagnetic standing wave was considered. It was shown that the spatial intensity distribution in stimulated echo hologram response depended on the electric field intensity of non-resonant standing wave that allowed controlling by a reproducible image.

Optics and Photonics Journal•Jan 1, 2016•1 citation

How the information-flux density in stimulated photon echo depends on the statistical characteristics of the object laser pulse

А. Р. Сахбиева, L. A. Nefedev, Е. Н. Ахмедшина

This paper discusses how the statistical characteristics of an object laser pulse affect the efficiency with which the information encoded in its temporal shape is reproduced. The dependence of the information-flux density in stimulated photon echo on the area of the object pulse is determined in two-level and three-level systems.

Journal of Optical Technology•Feb 1, 2015•2 citations

The influence of collisions on the temporary shape of stimulated echo hologram in gas

Е. Н. Ахмедшина, Leonid A. Nefediev, Guzel I. Garnaeva +1 more

In this paper, we investigate the influence of collisions with the change of particle velocity direction in a gas on the reproduction of the temporary shape of the object laser pulse in the stimulated echo hologram response. Due to such collisions, the frequency shifts of the radiation of atoms in the gas randomly vary (spectral diffusion within the heterogeneously broadened line). It is shown, that such diffusion leads to the not correlated heterogeneous broadening in the gas at the different time intervals and the partial loss of system phase memory, which results in a partial loss of retrieved information encoded in the temporal form of the object laser pulse.

Journal of Physics Conference Series•Jun 1, 2017•0 citations
The filtration of optical signals and the transformation of information using stimulated echo-holography in the case when its excitation occurs with the use of an object laser pulse carrying information and a pulse that acts as a frequency filter are considered. It is shown that the temporal form of the signal of the stimulated echo-hologram depends on the duration, amplitude, and area and time structure of the exciting pulses.
A set-theoretical method for studying information processes in resonant media with phase memory is developed. The conversion of the classical information carried by the object laser pulse into the potential (structural) quantum information of the resonant medium that takes place during the recording of a phase echo hologram is studied. It is shown that a resonant medium with phase memory stores quantum information in the form of an information-phase grating (the distribution of qubits within the inhomogeneously broadened line of a resonant transition). The temporal evolution of this grating is studied as a function of the times of reversible and irreversible relaxation of the system.
In this paper, we investigate the influence of collisions with the change of particle velocity direction in a gas on the reproduction of the temporary shape of the object laser pulse in the stimulated echo hologram response. Due to such collisions, the frequency shifts of the radiation of atoms in the gas randomly vary (spectral diffusion within the heterogeneously broadened line). It is shown, that such diffusion leads to the not correlated heterogeneous broadening in the gas at the different time intervals and the partial loss of system phase memory, which results in a partial loss of retrieved information encoded in the temporal form of the object laser pulse.