Anatoliy M. Negriyko

Dark resonances in rubidium atoms excited by optical comb

In a three-level lambda system, a destructive interference between excitation pathways at laser excitation can provide the resonant reduction of fluorescence and absorption (“dark resonance”). The dark resonances in rubidium vapor excited by a femtosecond laser or laser with frequency shifted feedback have been studied theoretically and experimentally.

Modelling of damage processes of the optical-cryogenic sensor at microscopic and macroscopic levels

The report will be devoted to the modelling of damage processes of the optical-cryogenic sensor at microscopic and macroscopic levels. The sensor is based on a new type of suspension of the probe of a supeconducting gravimeter. The interferometric method is provided coordinate measurement of the probe. The following main subjects will be covered by the report: (1) modelling of a supeconducting gravimeter; (2) modeling of a solid-state laser; (3) computer simulation of damage processes at microscopic and macroscopic levels; (4) response of thin films to intense short-wavelength radiation; (5) mathematical models for dynamic probabilistic risk assessment; (6) strategies for the design of optical components, and (7) software for modeling and prediction of ionizing radiation. For computer simulation of damage processes at microscopic and macroscopic levels the following methods are used: () statistical; (b) dynamical; (c) optimization; (d) acceleration modeling, and (e) mathematical modeling of laser functioning. Mathematical models of space ionizing radiation influence on gravimwter elements were developed for risk assessment in laser safety analysis.

Experimental study of electromagnetically induced transparency in molecular iodine

The interaction of a linear polarized weak probe wave with the molecular iodine driven by the strong pump wave with the orthogonal polarization is experimentally studied. An effect of electromagnetically induced transparency (EIT) is observed. The group velocity of the probe wave is decreased to 0,13c.

Cryogenic-Optical Sensor for High-Sensitive Gravitational Measurements

we suggested a model of competitiveness of brand product, which takes into account 10 factors. The model is based on 52 fuzzy rules of type. Potential of application of the model for control of competitiveness of brand product is shown. We state a problem of learning of fuzzy model of competitiveness on the basis of experimental data.