Mr. Ahmed Alkhlef Profile

Ahmed Alkhlef

at ITMO Univ

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Proceedings Article | 1 April 2020 Paper

Effect of phosphates content on the spectroscopic properties of the fluorophosphate glasses doped with Nd3+ ions

E. Kolobkova, A. Alkhlef, N. Nikonorov

Proceedings Volume 11357, 113571V (2020) https://doi.org/10.1117/12.2555856

KEYWORDS: Glasses, Neodymium, Ions, Luminescence, Absorption, Quantum efficiency, Spectroscopy, Crystals, Systems modeling, Phonons

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The influence of phosphate content on the formation and luminescent properties of Nd³⁺-doped fluorophosphate glass has been studied. Using the Judd-Ofelt theory the phenomenological intensity parameters Ωt (t= 2; 4; 6) were obtained. Absorption and emission measurements are performed in order to evaluate the spontaneous emission probability, absorption cross-section, emission cross-section, fluorescence lifetime and quantum efficiency. The stimulated emission cross-sections ⁴F_3/2→4I_11/2 and transitions were determined according to J-O theory by the modified reciprocity method (MR) for all phosphate concentrations and theoretical gain cross sections have been calculated. The effects of the glass rigidity and phosphate presence in glass composition on radiative properties have been estimated. In order to evaluate the amplification properties of studied samples at 1.06 μm, gain/loss spectra for glass with 5 mol.% of Ba(PO₃)₂ and commercial Nd³⁺-doped glass were experimentally obtained. Comparison with commercial Nd³⁺ doped glass showed that fluorophosphate glass has a higher gain of 1.8 dB/cm.

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