Optical properties of Nd3+-doped TeO2-TiO2-ZnO glasses with lower hydroxyl content

Abstract

This paper describes Nd 3+ -ions doped multicomponent tellurite glasses TeO2-TiO2-ZnO (TTZ) applicable to advanced optical devices, which were characterized by UV-Vis-NIR absorption, Raman, and photoluminescence (PL) techniques. Not only did we perform experimental characterizations but also theoretically predicted the PL properties of Nd 3+ -doped TTZ glasses by using the Judd-Ofelt theory. The influence of the residual hydroxyl (OH) groups and types of crucible used in the melt preparation on the structures and optical properties of TTZ glasses was investigated. We found that the use of a Pt crucible increased the network-connecting structures of trigonal bipyramidal TeO4 compared to the case of a Al2O3 crucible. Moreover, reducing the OH groups in TTZ glasses improved the optical properties of Nd 3+ -doped TTZ glass, and a higher spectral figure of merit of 8.71 × 10 −24 s cm 2 for Nd 3+ : 4 F3/2→ 4 I11/2 emission at 1,075 nm could be achieved, indicating that Nd 3+doped TTZ glass with lower hydroxyl content is promising for laser or active optical applications.

New understanding of TeO2–ZnO–Na2O ternary glass system

“…The TZN glasses were also doped with 0.5%wt Nd 3+ ions to study photoluminescent properties of the glasses, which will be reported elsewhere. As the doping was small, the structural data given in this paper for the TZN glasses with different ZnO concentration are not affected by the Nd 3+ ions (28). Low-frequency Raman spectroscopy is applied to gain structural information of medium range of orders for the TZN glasses with constant TeO 2 content 80%mol and varying ZnO content from 0 to 20%mol, which shed light on how the network evolution of tellurite glasses is influenced by ZnO (covalent) and Na 2 O (ionic) entities.…”

Effect of Nd2O3 and Na2O concentration on physical and spectroscopic properties of TeO2–Bi2O3–ZnO–Na2O–Nd2O3 glasses

“…Regardless of the limited laser source in our lab, the choice of this refractive index can compensate the refractive index difference arising from material dispersion, i.e., higher refractive index located at wavelength shorter than 650 nm and lower refractive index at longer wavelength. Perhaps for this reason, most works on Judd-Ofelt analysis published nowadays is based on such a single refractive index [27][28][29][30]. There are only few papers reporting Judd-Ofelt calculation by taking into account material dispersion [31].…”

High‐Temperature Investigation of TeO2–Na2O–ZnO Glasses

“…Tellurite glasses are good candidates for photonic applications because of their high linear refractive index, high dielectric constant, wide infrared transmittance, and high third-order nonlinear optical values as well as high solubility of rare-earth dopants. [1][2][3][4] Thus, a lot of works on luminescent rare-earth-doped tellurite glasses have been published [5][6][7][8][9] and a recent study is dedicated to development of downconversion phosphors of rare-earth-doped tellurite glasses for performance improvement of solar cells. [10] On the other hand, knowing the structural evolution of glasses is a difficult task that has sparked the interest of many researchers in the glass field.…”