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Polarization properties of stimulated photon echo in Pr 3 + :LaF 3 crystal

А. А. Калачев, L. A. Nefedev

Optics and SpectroscopyNov 1, 19930 citations

Nonlinear interference of two temporally nonoverlapping stimulated photon echo pulses in LaF 3 :Pr 3+ crystal

Edward A. Manykin, N. V. Znamenskiı̆, D. V. Marchenko +2 more

Conference on Lasers and Electro-OpticsMay 8, 19940 citations

Changes of photon echo by electromagnetic pulses in LaF 3 :Pr 3+

Шегеда Анатолий Михайлович, B. M. Khabibullin, V. N. Lisin +2 more

A strong decreasing of the intensity of the inverse 2-pulse, 3-pulse and long lived 3-pulse photon echo was observed when a current pulse passed through the strip evaporated onto the surface of the sample (current pulse was applied before or after the laser pulses). The strip is heated by the current pulse and there is the voltage difference at the ends of the strip. The voltage difference creates instantly the nonuniform electric field in the region of optical excitation so the echo intensity is decreased by the short-lived nonuniform line width rise. The line width rise is differentiated for the distinct type ion sites in the LaF3 unit cell. The strip current-heating gives rise to a phonon pulse. When phonon pulse reaches the optically excited volume it causes the shift of energy levels of Pr3+ ions, effecting a phase accumulation and the echo intensity change as a consequence.A strong decreasing of the intensity of the inverse 2-pulse, 3-pulse and long lived 3-pulse photon echo was observed when a current pulse passed through the strip evaporated onto the surface of the sample (current pulse was applied before or after the laser pulses). The strip is heated by the current pulse and there is the voltage difference at the ends of the strip. The voltage difference creates instantly the nonuniform electric field in the region of optical excitation so the echo intensity is decreased by the short-lived nonuniform line width rise. The line width rise is differentiated for the distinct type ion sites in the LaF3 unit cell. The strip current-heating gives rise to a phonon pulse. When phonon pulse reaches the optically excited volume it causes the shift of energy levels of Pr3+ ions, effecting a phase accumulation and the echo intensity change as a consequence.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIEMay 10, 19960 citations

Photon echo modulation effects in LaF3:Pr3+

Y.C. Chen, Sven R. Hartmann

Physics Letters AAug 1, 197617 citations

Nanosecond image processing using stimulated photon echoes

E. Y. Xu, M. K. Kim, Stefan Kröll +2 more

Processing of two-dimensional images on a nanosecond time scale is demonstrated using the stimulated photon echoes in a rare-earth-doped crystal (0.1 at. % Pr(3+):LaF(3)). Two spatially encoded laser pulses (pictures) resonant with the (3)P(0)-(3)H(4) transition of Pr(3+) were stored by focusing the image pulses sequentially into the Pr(3+):LaF(3) crystal. The stored information is retrieved and processed by a third read pulse, generating the echo that is the spatial convolution or correlation of the input images. Application of this scheme to high-speed pattern recognition is discussed.Processing of two-dimensional images on a nanosecond time scale is demonstrated using the stimulated photon echoes in a rare-earth-doped crystal (0.1 at. % Pr(3+):LaF(3)). Two spatially encoded laser pulses (pictures) resonant with the (3)P(0)-(3)H(4) transition of Pr(3+) were stored by focusing the image pulses sequentially into the Pr(3+):LaF(3) crystal. The stored information is retrieved and processed by a third read pulse, generating the echo that is the spatial convolution or correlation of the input images. Application of this scheme to high-speed pattern recognition is discussed.

Optics LettersMar 26, 199035 citations

Multiple readout of long-lived photon echo signals and nuclear relaxation

В. А. Зуйков, А. А. Калачев, L. A. Nefedev +1 more

The relaxation decay of long-lived stimulated photon echo signals in a Pr 3+ :LaF 3 crystal was found to be independent of the number of readout pulses when the area under these pulses was small. A theoretical description of this effect is provided and a good agreement between the theory and experiment is reported.

Quantum ElectronicsMar 31, 19961 citation

Effect of electromagnetic and phonon pulses on a photon echo in LaF{sub 3}: Pr{sup 3+}

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Effect of electromagnetic and phonon pulses on a photon echo in LaF{sub 3}: Pr{sup 3+}

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