Synthesis and Studies of Physical and Optical Properties of Heavy Metal Oxide doped Tellurite Base Glasses for Non linear Optical Application

Abstract

ABSTRACT newlineSince the last several decades, heavy metal oxide glasses have been researched; they offer superior physical and optical characteristics than silicate and borate glasses. Due to their exceptional qualities, such as high rates of linear and nonlinear refraction, medium-frequency phonons, high solubility to rare earth ions, and low melting temperatures, HMOs materials offer a significant potential for use in the field of photonics. Glasses made of tellurite have high linear and nonlinear refractive indices. In this regard, tellurite glasses may stimulate the creation of several novel photonics applications and products. newlineIn this work, series of boro-tellurite base glasses co-doped heavy metal oxides as bismuth oxide, were successfully synthesized by traditional melt and quench method. Characterizations as XRD, DSC, UV-VIS-IR absorption and photoluminescence. XRD justify the nature of glass sample whereas DSC gives the information of thermal properties. newlineThe ternary bismuth boro- tellurite glass systems with chemical composition (80-X) TeO2- 20%B2O3-X%Bi2O3 (where x is 5, 10, 15 and 20%) were prepared by using traditional melt quenching technique. The study showed that optical parameters like refractive index and forbidden energy gap are unchanged by sample thickness.Due to its good thermal stability glass is a suitable material for optical fibre devices. newlineThe photoluminescence properties Ho/Yb co-doped Bismuth boro-tellurite glasses were carried by excited by 980 nm laser diode, intense green and red emissions were detected easily even by naked eyes. The observed intense red emission is thought to be caused by a combination of excited state absorptions between different levels of Ho ions and cooperative energy transfer upconversion from a pair of Yb donor ions to one Ho acceptor ion, in addition to the usual direct energy transfer process from Yb3+ to Ho3+. newlineYb-Tm-Ho doped bismuth boro-tellurite glass (68%TeO2-10%Bi2O3-20%B2O3-1%Yb2O3- newline0.5 Tm2O3-0.5%Ho2O3) was created. The intense red upconversion emission at