Objective The project is aimed at establishing the electron mechanisms underlying the phenomenon of irreversible refractive index change in doped silica glasses under the action of an intense UV radiation. This phenomenon, known as 'photorefractive effect', is most pronounced in glasses with non-stoichiometric composition and finds wide use in the modern fibre-optic technology. Based on the photorefractive effect, in-fibre refractive index Bragg gratings are manufactured for applications in optical communication systems and sensors.The project contains theoretical and experimental tasks, which are closely connected and complementary, and combines scientists actively working in the fields of solid state physics and fibre optics. A distinctive feature of the research programme is that it forms a complete research cycle. It begins with preparation of highly photorefractive silica glasses using a unique plasmachemical technology and includes investigation of UV absorption and luminescence in the glasses, drawing the fibres, writing in-fibre refractive index gratings, measuring the value of the photorefractive effect, investigation of the behaviour of in-fibre gratings under gamma-radiation. The experimental results obtained will be analysed within the framework of the model of structurally non-rigid oxygen vacancy in the glass network. The mechanisms of the electron rearrangements of such defects under photoexcitation will be compared in silica glasses with different dopants. Estimations will be made of the magnitude of the electron rearrangement effects, including their effect on the dielectric permeability. Programme(s) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Topic(s) 1B - Condensed Matter, Optics and Plasma Physics RUSSIA - RUSSIA Call for proposal Data not available Funding Scheme Data not available Coordinator SCK·CEN Nuclear Research Centre EU contribution No data Address Boeretang 200 2400 Mol Belgium See on map Total cost No data Participants (3) Sort alphabetically Sort by EU Contribution Expand all Collapse all Fibre Optics Research Centre Russia EU contribution No data Address Vavilova 38 117756 Moscow See on map Total cost No data Russian Academy of Sciences Russia EU contribution No data Address Leninskii prospekt 53 117924 Moscow See on map Total cost No data Universite des Sciences et Technologies de Lille France EU contribution No data Address Batiment P5 Villeneuve d'Ascq 59655 Lille Cedex See on map Total cost No data
