Abstract
In this chapter we will discuss in detail about structural and luminescence properties of heavy metal oxide-based TeO2 glasses incorporated by rare-earth ions. The glasses were developed by conventional melt quenching method, and the structural analysis was done by XRD, FTIR, and Raman. The XRD patterns confirm the amorphous nature of the samples, and the FTIR characterization showed the formation of more non-bridging oxygen atoms in the glass network with the inclusion of rare-earth ions. Spectroscopic characterizations such as optical absorption, photo luminescence, and decay profile measurements were performed on the glasses. The Judd-Ofelt theory has been employed on optical absorption spectra to evaluate the Judd-Ofelt (J-O) intensity parameters Ωλ (λ = 2, 4, 6). The measured J-O intensity parameters were used to determine the emission transition probability (AR), stimulated emission cross section (σ(λp)), branching ratios (βR), and radiative lifetimes (τR) for various emission transitions from the excited levels of rare-earth ions in the host glass network. The obtained results showed the use of the glasses for potential applications in the field of laser technology.
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