Growth peculiarities and non-linear properties of profiled doped strontium-barium niobate crystals

The nominally pure and doped with Ce, Cr, Co strontium-barium niobate crystals of SBN:61 were grown by modified Stepanov technique. The specific features of the technique were studied and growth conditions for obtaining the high homogeneous SBN crystals in bulk-profiled configuration were optimized. The photorefractive and non-linear properties of SBN pure and doped with Ce, Cr and Co were investigated. It was shown that SBN:Ce crystal is an excellent medium for high efficiency holographic information recording. SBN:Cr and SBN:Co crystals are promising photorefractive materials with short response time. The as-grown SBN crystals were also used to demonstrate the diffuse noncollinear second harmonic generation emitted by a random domain SBN structure and Stimulated Raman Scattering and two-photon absorption associated with cubic nonlinear susceptibility of the materials

The Influence of Stabilizing Impurities and Annealing on the Structure and Mechanical Properties of Partially Stabilized Zirconia

The phase composition and evolution of the twin structure of PSZ crystals, depending of the concentration stabilizing impurities have been investigated by X-ray diffraction and transmission electron microscopy. The measurements of hardness and fracture toughness by microindentation have been carried out. In work is shown that the high mechanical characteristics of PSZ crystals are related to features of their phase composition and structure, namely the degree of tetragonality the phase and the presence of domains ranging in size from tens to hundreds of nanometers. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3507

Cr, Ce, Nd : GGG crystal as active medium for efficient flashlamp pumped solid-state lasers

No abstract availabl

ZnMgSe:Cr²⁺ — a new active medium for lasers of middle IR

For the first time, laser generation is obtained in Zn₀.₇₅Mg₀.₂₅Se:Cr²⁺ single crystal. It is established that wavelength tuning in this laser can be realized in 2.2-2.6 μm region. The optical, luminescent and generation characteristics of the new active laser medium are studied and compared with the corresponding characteristics of ZnSe:Cr²⁺ single crystal.Вперше отримано лазерну генерацію у монокристалі Zn₀.₇₅Mg₀.₂₅Se:Cr²⁺. Перестроювання довжини хвилі генерації такого лазера можна здійснювати у діапазоні 2,2- 2,6 мкм. Досліджено оптичні, люмінесцентні та генераційні характеристики нового активного лазерного середовища та проведено їх порівняння з характеристиками монокристалів ZnSe:Cr²⁺.Впервые получена лазерная генерация в монокристалле Zn₀.₇₅Mg₀.₂₅Se:Cr²⁺. Перестройка длины волны генерации может осуществляться в диапазоне 2,2-2,6 мкм. Изучены оптические, люминесцентные и генерационные характеристики новой активной лазерной среды и проведено их сравнение с характеристиками монокристаллов ZnSe:Cr²⁺

ZnMgSe:Cr²⁺ — a new active medium for lasers of middle IR

For the first time, laser generation is obtained in Zn₀.₇₅Mg₀.₂₅Se:Cr²⁺ single crystal. It is established that wavelength tuning in this laser can be realized in 2.2-2.6 μm region. The optical, luminescent and generation characteristics of the new active laser medium are studied and compared with the corresponding characteristics of ZnSe:Cr²⁺ single crystal.Вперше отримано лазерну генерацію у монокристалі Zn₀.₇₅Mg₀.₂₅Se:Cr²⁺. Перестроювання довжини хвилі генерації такого лазера можна здійснювати у діапазоні 2,2- 2,6 мкм. Досліджено оптичні, люмінесцентні та генераційні характеристики нового активного лазерного середовища та проведено їх порівняння з характеристиками монокристалів ZnSe:Cr²⁺.Впервые получена лазерная генерация в монокристалле Zn₀.₇₅Mg₀.₂₅Se:Cr²⁺. Перестройка длины волны генерации может осуществляться в диапазоне 2,2-2,6 мкм. Изучены оптические, люминесцентные и генерационные характеристики новой активной лазерной среды и проведено их сравнение с характеристиками монокристаллов ZnSe:Cr²⁺