Growth, Characterization and Application of KTN Family Nonlinear Optical Crystals.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 08, 1994
- Accession Number
- ADA290330
Entities
People
- Amnon Yariv
- Anthony Kewitsch
- Rudy Hofmeister
Organizations
- California Institute of Technology