Characterization technique of crystalline materials for most efficient their application as active element of electro-optic cell in infocommunication systems
In this work we present the experimental technique suitable for the determination of all the linear electro-optic effect (LEOE) tensor components in crystal materials of any symmetry. We describe in details the sample geometries that are needed to determine a complete set of the LEOE tensor components as well as derive the corresponding equations. It gives a possible to perform the electro-optic characterization for all crystalline materials with aim of most efficient their application as active elements of electro-optic cells for infocommunication systems.
Growth and Optical Properties of LiNbO3: MgO Single Crystals
The technological procedure of the manufacturing of the LiNbO3˙ single crystals doped with 5 mol.% MgO is described in this paper. The results of the investigation of the crystal optical properties, ESR spectra and optical homogeneity are presented. The refractive index dispersion in 300–700 nm region and their temperature dependencies in 20–500 °C range are measured. The dispersion curve is approximated by the two oscillator Sellmeier formula. The data on the LiNbO3: MgO crystal optical resistance are presented.
OH-related defects in LiNbO3: Mg,M (M = Nd, Cr, Ti, Mn) crystals
Abstract In addition to the 3539 cm −1 OH − stretching vibration related to Mg 2+ OH − complexes, OH − bands at 3522 and 3506 cm −1 were found in MgNd and MgCr doubly doped LiNbO 3 crystals, respectively. These bands, polarized perpendicular to the c -axis, are interpreted as an OH − vibration in an M 3+ OH − Mg 2+ association. In this complex the OH − ion is assumed to be located between the M 3+ and Mg 2+ ions which occupy Nb 5+ and Li + sites, respectively. In Mg 2+ Ti 4+ and Mg 2+ Mn 2+ codoped LiNbO 3 , no OH − band corresponding to that kind of complex was observed. The absorption strength of the OH − ions involved in the M 3+ OH − Mg 2+ association is about 6 × 10 −20 cm 2 ion −1 .