Kosmyna M. Technologies for the obtaining of oxide single crystals and elements for laser, scintillation engineering and devices of optical information record

The new growth technology of the co-doped Y3Al5O12:Nd:Cr,Ce single crystals to be widely used in laser engineering, is developed and brought into commercial practice. The growth technology of doped lead tungstate and molybdate crystals meant for Raman lasers working in 1.2-1.5 ?m region, is created. The proposed new principles and approaches to the doping of a wide class of oxide crystals with different elements have made it possible to raise the radiation power, stability of parameters after a large number of working cycles, and extend the frequency range for the laser crystals, to increase the light output for the scintillation crystals, as well as to extend the region of the existence of photo-induced effects to room temperatures for the antiferromagnetic garnets. Developed is the technology for the growth of large-size cadmium tungstate CdWO4 and lead tungstate PbWO4 single crystals. On the base of these crystals, scintillation detectors for portable gamma-spectrometers, radiation monitors and electromagnetic calorimeters, are created. A system for detection of gamma-radiation is developed for human radiation spectrometer. For the first time, new CdLa2(WO4) single crystals are grown by the Czochralski method. The structure of these crystals is studied, and the spectral and luminescent properties are investigated. For the first time, a series of new-composition antiferromagnetic garnet crystals Ca3Ga2-xMnxGe3O12, is grown. The effects of photo-induced light absorption and dichroism at room temperature revealed in these crystals opens up prospects of their use for optical information record.