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Wyszukujesz frazę "active glasses" wg kryterium: Temat

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Active glasses as the luminescent sources of radiation for sensor applications
    Autorzy:
    Żmojda, J.
    Dorosz, D.
    Kochanowicz, M.
    Dorosz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/201797.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    tellurite glasses
    antimony-silicate glasses
    Yb3+
    Tm3+
    upconversion
    blue luminescence
    energy transfer
    active glasses
    Opis:
    The article presents physicochemical, thermal and spectroscopic properties of two different glass systems: TeO2-GeO2-PbO-PbF2- BaO-Nb2O5-LaF3 and SiO2-Al2O3-Sb2O3, co-doped with Yb3+/Tm3+ ions. Blue upconversion luminescence at a wavelength of 478 nm corresponding to the thulium 1G4 ⇥3H6 transition was observed under 976 nm pump radiation in both of the co-doped glasses. This indicated the existence of efficient Yb3+ ⇥ Tm3+ energy transfer via three-photon absorption mechanism. Thermal and optical results substantiate the claim for practical applicability of the manufactured glasses in design of optical fiber sources.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 2; 393-397
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    2.1 žm emission of Tm3+/Ho3+ - doped antimony-silicate glasses for active optical fibre
    Autorzy:
    Żmojda, J.
    Dorosz, D.
    Dorosz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/200143.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    antimony-silicate glasses
    Tm3+/Ho3+ glasses
    active optical fibre
    Opis:
    Tm3+/Ho3+ – doped antimony-silicate optical fibre with 2.1 ěm emission has been presented. Luminescence corresponding to 5I7 --> 5I8 transition in holmium was obtained by energy transfer between Tm3+ and Ho3+ ions. The analysis of the luminescence mechanism showed a significant influence of the glass composition (low phonon content) on the emission intensity. Optimization of the active elements content, presented in the paper, allowed to indicate that a strong emission intensity at 2 ěm in the fabricated glasses was obtained for the molar composition of 1% Tm2O3 : 0.75% Ho2O3. According to the F¨orster-Dexter theory, the efficiency of energy transfer of the 3F4 (Tm3+) --> 5I7 (Ho3+) transition was calculated. Moreover, it was found that the full width at half maximum (FWHM) of luminescence in the range of 1.6 – 2.2 ěm strongly depends on the Tm3+/Ho3+ ratio. The optimization of Tm3+/Ho3+ transfer in antimony-silicate glasses allowed to fabricate optical fibre with narrowing and red-shifting of emission at 2.1 ěm.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 381-387
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Active optical fibres for application in laser and broadband ASE sources
    Autorzy:
    Dorosz, D.
    Dorosz, J.
    Zając, A.
    Żmojda, J.
    Kochanowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/201633.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    active optical fibres
    double-clad fibres
    RE doped glasses
    rare earth elements (REE)
    Opis:
    The article brings into focus the present state of technology employing active fibres doped with rare earth (RE) ions for applications requiring power supply of several dozen watts and broadband ASE sources. Current trends in development of glasses and in construction of active fibres used in fibre sources of radiation within VIS-NIR range are presented. Technological constraints in the doping of fibre core glasses are discussed, with particular consideration of optimal RE concentration for technical applications. Characteristics of glasses are offered, and the glasses are used for manufacturing optical fibres with luminescence within the visible as well as near- and mid-infrared ranges. Also, requirements and luminescence properties concerning glasses co-doped with e.g. Nd3+/Yb3+,Tm3+/Ho3+ and Yb3+/Tb3+ are discussed. Results of research on the impact of technological parameters of glass matrices on luminescence properties of core glasses and optical fibres are quoted. For the doped glasses of which luminescence in a wide spectral range is desired, conditions for their processing into optical fibre systems are mentioned. Additionally, the impact of phonon energy in the glass on producing emission in a specified spectral range is analyzed. Furthermore, the article presents directions of technological studies to solve problems persisting in the phase of glass matrix design, as well as in determining the influence of fibre drawing process on the luminescence properties of core glasses and optical fibres, confirming the differences in luminescence stemming from the drawing process. Finally, some original designs of core glasses and active multicore fibre systems devised for construction of fibre radiation sources are presented.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 4; 673-682
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Fiber Technology 2012
    Autorzy:
    Romaniuk, R. S.
    Wójcik, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/226186.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lightguide
    optical fiber
    photonics
    optical fiber photonics
    optoelectronics
    optical fiber technology
    optical fiber glasses and polymers
    active optical fibers
    photonic optical fibers
    microstructured optical fibres
    microoptics
    photonic materials and metamaterials
    fiber lasers
    Opis:
    The Conference on Optical Fibers and Their Applications, Nałęczów 2012, in its 14th edition, which has been organized since more than 35 years, has summarized the achievements of the local optical fiber technology community, for the last year and a half. The conference specializes in developments of optical fiber technology, glass and polymer, classical and microstructured, passive and active. The event gathered around 100 participants. There were shown 60 presentations of 20 research and application groups active in fiber photonics, originating from academia and industry. Topical tracks of the Conference were: photonic materials, planar waveguides, passive and active optical fibers, propagation theory in nonstandard optical fibers, and new constructions of optical fibers. A panel discussion concerned teaching in fiber photonics. The conference was accompanied by a school on Optical Fiber Technology. The paper summarizes the chosen main topical tracks of the conference on Optical Fibers and Their Applications, Nałęczów 2012. The papers from the conference presentations will be published in Proc. SPIE, including a conference version of this paper. The next conference of this series is scheduled for January 2014 in Białowieża.
    Źródło:
    International Journal of Electronics and Telecommunications; 2013, 59, 2; 131-140
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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