Synthesis and optical behavior of neodymium ion doped borophosphate glass for laser applications

초록

Nd3+ ion doped lithium aluminum gadolinium borophosphate glasses were synthesized by melt quenching technique. The hypersensitive transitions were identified in the absorption spectra for ultraviolet (UV), visible (Vis) and near infrared (NIR) region, which the highest intensity is recorded at the transitions 4I<inf>9/2</inf>→4D<inf>5/2</inf>, 4I<inf>9/2</inf>→4G<inf>5/2</inf> and 4I<inf>9/2</inf>→4F<inf>5/2</inf> with wavelengths of 352, 582 and 804 nm, respectively. The spectroscopic properties of emission spectra in Nd3+ doped present glasses were investigated under 808 nm laser excitation and shows the strongest intensity at 1063 nm, which corresponding the transition 4F<inf>3/2</inf>→4I<inf>11/2</inf>. Furthermore, JO parameters (Ω<inf>2</inf>, Ω<inf>4</inf> and Ω<inf>6</inf>) are produced, which are then utilized to examine the radiative characteristics of Nd3+ doped glasses for example radiative transition probability (A<inf>R</inf>), radiative lifetimes (τ<inf>rad</inf>), branching ratios (β), gain bandwidth (Δλ<inf>eff</inf>×σ<inf>e</inf>), optical gain (σ<inf>e</inf>×τ<inf>rad</inf>) and emission cross-section (σ<inf>e</inf>). The results demonstrated that the LBPNd0.5 glass might be used in laser applications around 1.058 µm region, which represent highest stimulated emission cross-section (53.49 ×10–21 cm2), higher branching ratio (>0.5), highest quantum efficiency (84.58%), lower non-radiative decay rates (720 s−1) compared with other glasses. © 2023 Elsevier GmbH

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