Accession Number : ADP006696

Title :   Characterization of a New Photorefractive Material:K sub 1-y, L sub y, T sub 1-x, N sub x,

Corporate Author : NANKAI UNIV TIANJIN (CHINA) DEPT OF PHYSICS

Personal Author(s) : Agranat, Aharon ; Hofmeister, Rudy ; Leyva, Victor ; Yariv, Amnon

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : We have demonstrated the growth of a new photorefractive material, KLTN, and have characterized its photorefractive properties. The crystal was of good quality with a phase transition at 178 (dot) K. It displayed a strong quadratic photorefractive effect with a sensitivity of 0.0000724. The maximum diffraction efficiency observed was 75% with a corresponding coupling constant of Gamma = 1.75/cm. The writing times were given by tau sub write = 6 sec-sq.cm/W, and there was a strong read/write time asymmetry. The photorefractive process was shown to be voltage 'controllable. Based on this work, KLTNs seem to be highly promising materials for volume hologram storage applications.

Descriptors :   *HOLOGRAMS, ASYMMETRY, CONSTANTS, COUPLINGS, CRYSTALS, DIFFRACTION, EFFICIENCY, HOLOGRAMS, MATERIALS, PHASE, PHASE TRANSFORMATIONS, QUALITY, SENSITIVITY, STORAGE, TIME, TRANSITIONS, VOLTAGE, VOLUME, WORK, WRITING, OPTICAL PROPERTIES, REFRACTION, DIFFRACTION, CRYSTAL GROWTH, SPACE CHARGE, NEURAL NETS, SYMPOSIA.

Subject Categories : Optics
      Acoustooptic and Optoacoustic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE