The temperature dependency of the total emission intensity and the decay time cone stant of the 5D0 level after the CTB excitation was investigated in various glasses con taming Eu3+, and nonradiative process of Eu3+ center was discussed in connection with the effect of host composition. The broad UV excitation band induced by Eu3+ was considered to be ascribed to the charge transfer states of ...

In this work, we report permanent reduction of Eu to Eu in sodium borate glasses by irradiation of near-infrared femtosecond laser. Glass composition of sodium borate was 85B2O3–15Na2O. The glasses were doped with 0.05, 0.1, and 0.5mol% Eu2O3. Absorption and fluorescence dynamics were studied to investigate valence state change of europium ions and the energy transfer between Eu and Eu ions. As...

We investigate the spectroscopic properties of the 1.5-microm emission from the (4)I(13/2)-->(4)I(15/2) transition of Er(3+) ions in bismuth-germanate-lead glasses for applications in broadband fiber amplifiers. The emission peak locates at 1532nm with a full width at half-maximum (FWHM) of approximately 65nm. The measured lifetime and the calculated emission cross-section of this transition ar...

Structure and properties of magnesium silicate borate melts glasses were investigated by using newly parameterized interaction potentials in molecular dynamics simulations compared with those calcium borate. The competition between the depolymerization silica network formation new bonds modifier ions leads to enhancement elastic moduli increasing content alkaline earth glasses. Compared silicat...

Driven by the increasing economic burden associated with bone injury and disease, biomaterial development for bone repair represents the most active research area in the field of tissue engineering. This article provides an update on recent advances in the development of bioactive biomaterials for bone regeneration. Special attention is paid to the recent developments of sintered Na-containing ...

We fabricated a series of glasses with the composition 94.7GeO2-5Al2O3-0.3Bi2O3PbO =0–24 mol. % . Characteristic absorption bands of bismuth centered at 500, 700, 800, and 1000 nm were observed. Adding PbO was found to decrease the strength of bismuth absorption. The addition of 3%–4% PbO resulted in a 50% increase in lifetime, a 20-fold increase in quantum efficiency, and a 28-fold increase in...

Saturable absorption in bismuth-doped glasses was found to have a noticeable influence on soliton interaction and group formation. This phenomenon, observed in 1450 nm mode-locked bismuth-doped fiber laser, shows the distinct feature of the multiple pulse regime, which appears as a stationary pulse group whose length can be spread over the whole cavity length by variation of the pump power and ...