Accession Number : ADA290330

Title :   Growth, Characterization and Application of KTN Family Nonlinear Optical Crystals.

Descriptive Note : Final rept. 12 Aug 92-30 Jun 94,

Corporate Author : CALIFORNIA INST OF TECH PASADENA DEPT OF APPLIED PHYSICS

Personal Author(s) : Yariv, Amnon ; Kewitsch, Anthony ; Hofmeister, Rudy

PDF Url : ADA290330

Report Date : 08 NOV 1994

Pagination or Media Count : 7

Abstract : We have recently grown KLTN:(Cu, Ni, Ni/Ti) and SBT crystals and characterized their nonlinear-optical properties. The growth of these high quality crystals is a result of recent improvements in the crystal growth system; namely, improved flux uniformity and higher operating temperature. These and other materials have been characterized for application to holographic data storage and quasi-phase matched second harmonic generation. In particular, the paraelectric KLTN materials doped with Ni exhibit an enhanced long wavelength sensitivity (> 600 nm), which is desirable for recording holograms with ubiquitous He-Ne or semiconductor lasers. Furthermore, we have discovered that dynamic ferroelectric domain gratings in addition to the more common electrooptic gratings are present in SBN, a close relative of SBT. This has important applications to permanent fixing of volume holograms and tunable quasi-phase matching. To complement this experimental work, we have also derived analytical expressions for the two beam coupling process which allows us to deduce photorefractive material parameters for these crystals. This balance of experimental and theoretical work has enabled us to continually develop new materials whose properties are optimized for nonlinear optical applications.

Descriptors :   *RECORDING SYSTEMS, *PHOTOREFRACTIVE MATERIALS, *HOLOGRAMS, COUPLING(INTERACTION), OPTICAL PROPERTIES, ELECTROOPTICS, THEORY, SEMICONDUCTOR LASERS, CRYSTALS, SENSITIVITY, GRATINGS(SPECTRA), HOLOGRAPHY, NONLINEAR SYSTEMS, MATHEMATICAL ANALYSIS, DATA STORAGE SYSTEMS, FERROELECTRIC MATERIALS, CRYSTAL GROWTH.

Subject Categories : Holography

Distribution Statement : APPROVED FOR PUBLIC RELEASE