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Information × Registration Number 0211U000106, 0106U002454 , R & D reports Title Researches, development and applications of the phase holographic materials and elements. popup.stage_title Head Tichonov E.A, Registration Date 14-01-2011 Organization Institute of physics NASU popup.description2 Subjects of investigation: phase holographic gratings (FGR) and holographic materials for their manufacturing, spectroscopic instrumentations on the basis of the FGR, lasers on liquid crystalls, lasers with a random feedback. Research objective: working out of methods of gauging FGR and their applications in spectroscopic instrumentations /laser, study of laser generation with a random feedback. Research techniques: experimantfal and theoretical Main scientific and practical results on all sections: It is shown that optical parametres thick (20?Т?500)mkm phase gratings on photopolymetric compound FPK-488 are spotted with H.Kogelnika's coupled wave model and experimental data. Phase recording PHG at minimum amplitude is restricted to fluctuations of the refraction index of a holographic material. Samples of transmission PHG with spectral width (1,5-2.0)nm are created and functioning of slitless spectroscopic instrumentations on their base is shown. Such PHG the procedure of application is developed for measuring of a wave length of light, in the capacity of sensor of vibrations and dispersion elemets of resonators. Examination of a new appearance of an stimulated radiation in the conditions of multiple light scattering in a gain medium is conducted. It is shown that multiple scattering of light creates conditions for its space localisation and development of stimulated radiations with superluminescence performances (SL). At pumping increment the mechanism of the active Raman scattering spectroscopy at participation SL with simultaneous excitation of several transitions on frequencies of the molecular Raman scattering of the laser dye agent involved in the basic process is labilised. Deductions concerning prospects of scientific and practical development: he study of requirements at which restriction on minimum amplitude of a phase holographic recording is attenuated seems to be obviously important. With definition of these requirements there is possible PHG recording with angular selectivity of unity of minutes and reaching of spectroscopic selectivity in shares nanometra. It is important for practical applications the perfection of the discovered technological solutions for improvement of opeating characteristics PHG. Similar PHG will allow to create qualitatively new optical instruments: slitless monochromators and spectrometers, new types of the interferometers, frequency tunable lasers with spectrally limited emission of generation and others. Product Description popup.authors Єжов Павло Валентинович Івашкін Володимир Олександрович Ільчишин Ігор Павлович Кохтич Людмила Михайлівна Лямець Олександр Констянтинович Смірнова Тетяна Миколаївна Тихонов Євген Олександрович Ящук Василь Павлович popup.nrat_date 2020-04-02 Close