Accession Number : ADP006743

Title :   Experimental Comparison of the 'AC Field'and 'Moving Grating' Techniques for BTO and BSO Crystals,

Corporate Author : AKADEMIYA NAUK SSSR LENINGRAD FIZIKO-TEKHNICHESKII INSTITUT

Personal Author(s) : Mokrushina, E. V. ; Prokof'ev, V. V. ; Sochava, S. L. ; Stepanov, S. I.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : There are two techniques of nonstationary holographic recording which are widely used for PRCs with long drift lengths of photocarriers. There are recording of a moving interference pattern in an external DC electric field and recording of a fixed pattern in an AC field. Both of them allow the efficiency of the drift mechanism of recording in the external electric field to be increased and the recorded hologram to be transformed into a shifted one. The theory predicts equal efficiencies of two-wave energy exchange for these two techniques. In practice, the moving grating technique is traditionally employed for Bi12SiO20 (BSO), but for Bi TiO (BTO), recording in an AC field is in common use. Recent investigations of holographic recording in semi-insulating GaAs:Cr (lambda=1.06 um) have demonstrated remarkable superiority of the moving grating mechanism.

Descriptors :   *HOLOGRAPHY, DRIFT, EFFICIENCY, ELECTRIC FIELDS, ENERGY, ENERGY TRANSFER, EXTERNAL, HOLOGRAMS, INTERFERENCE, GALLIUM ARSENIDES, CRYSTALS, GAIN, GRATINGS(SPECTRA), DIFFRACTION, CRYSTAL GROWTH, SYMPOSIA, REFRACTION.

Subject Categories : Holography
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE