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Журнал прикладной спектроскопии

ОПЕРАЦИЯ КОНЪЮНКЦИИ ДЛЯ СИГНАЛОВ В ОПТИЧЕСКОЙ ЭХО-ГОЛОГРАФИИ

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

Published Mar 21, 2020• 0 citations
OpenAlex

Abstract

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.

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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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Abstract The possibility of implementing logical operations with images using the accumulated echo hologram in the presence of external spatially inhomogeneous electric fields is considered. It is shown that the photon echo locking effect makes it possible to control the execution of logical operations (from the union of sets to the symmetric difference and their superposition), as well to control their form by varying the values of the gradients of external spatially inhomogeneous electric fields and the phase difference between pairs of pulses.

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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.

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The process of recording and reproducing information in a three-level system using stimulated photon echo is studied as a function of the amount of information embedded in the first and second two-frequency object laser pulses. It is shown that two-frequency information recording leads to an increase in the power of the stimulated photon echo response on one frequency transition and to its reduction on the other.

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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
Abstract The possibility of implementing logical operations with images using the accumulated echo hologram in the presence of external spatially inhomogeneous electric fields is considered. It is shown that the photon echo locking effect makes it possible to control the execution of logical operations (from the union of sets to the symmetric difference and their superposition), as well to control their form by varying the values of the gradients of external spatially inhomogeneous electric fields and the phase difference between pairs of 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.