The optimal temperature regime for the synthesis of glass ceramics with YNbO 4 : Tb 3+ crystalline inclusions has been established. Glass were synthesized on basis a sodium borate matrix from oxide precursors. It established that at 950 o C is optimal, since this only one phase formed in and its content maximum. spectra obtained by method local cathodoluminescence, composition was studied X-ray...

Ion-exchange on glass is one of the major technological platforms that are available to manufacture low-cost, high performance Planar Lightwave Circuits (PLC). In this paper, principle ion-exchanged waveguide realization presented. Then a review main achievements observed over last 30 years will be given. The focus first made devices for telecommunications (passive and active ones) before appli...

TM , using focused ion beam technology has been characterized. To date, most microfabrication in this material has used UV lithography and UV lasers, with minimum feature size of around 10µm determined by the grain structure, though there has been some recent work using high energy proton irradiation. Focused ion beam technology offers two potential advantages: features are etched directly with...

Glass structure and fluorine motion dynamics are investigated in lead-cadmium fluorgermanate glasses by means of differential scanning calorimetry, Raman scattering, x-ray absorption (EXAFS), electrical conductivity (EC), and (19)F nuclear magnetic resonance (NMR) techniques. Glasses with composition 60PbGeO(3)-xPbF(2)-yCdF(2) (in mol %), with x+y=40 and x=10, 20, 30, 40, are studied. Addition ...

Submit Manuscript | http://medcraveonline.com only osteoconductivity but also osteoinductivity, has attracted much interests in the field of bone tissue engineering but not only. Indeed, the typical silicate bioactive glasses demonstrated to bond to bone more efficiently than any other synthetic materials [1]. However, it was rapidly found that the highly disrupted silica network of bioactive g...

In this work, mixed alkali metaphosphate glasses based on K-Na, Rb-Na, Rb-Li, Cs-Na and Cs-Li combinations were studied by differential scanning calorimetry (DSC), complex impedance spectroscopy, and Raman spectroscopy. DSC analyses show that both the glass transition (Tg) and melting temperatures (Tm) exhibit a clear mixed-ion effect. The ionic conductivity shows a strong mixed-ion effect and ...

Polarization dependence of UV-written Bragg gratings in buried ion-exchanged glass waveguides is investigated. A polarization-dependent shift in Bragg wavelength of less than 0.02 nm is measured, both for the even and the odd modes of a laterally dual-mode waveguide. The measured wavelength shift corresponds to a waveguide birefringence of the order of 10(-5), which is negligible for most appli...

It is well known that the quark-gluon plasma (QGP) produced in heavy ion collisions can be successfully described by hydrodynamics; successful hydrodynamics requires rapid thermalization with the thermalization time τ0 less than 1 fm/c [1]. Studying the dynamical processes before the formation of the QGP can provide initial conditions for the hydrodynamic simulations. During the hydrodynamic ev...

A ytterbium-doped, glass, channel waveguide laser, fabricated by ion exchange, is reported. The 2.2-cm long device, using broad-band 4% output couplers, lased in the vicinity from 1020 to 1030 nm when pumped by a Ti : sapphire laser operating at 910 nm. A lasing threshold of 50 mW (launched pump) and a slope efficiency of 5% were measured. Device parameters, including fluorescence lifetimes, em...