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|Type:||Artigo de evento|
|Title:||Lifetime Of The4i13/2 Excited Level Of The Er 3+-ion In The Glass System Teo2-wo3-na 2o-nb2o5|
|Abstract:||Tellurite glasses optical fibers became promising for optical amplifiers due to its high rare earth ions solubility. One of the most important parameter for optical amplification is the lifetime of the excited states, which strongly depends on the crystal field around the ions. That crystal field changes dramatically with the host glass and with rare earth concentration. Excited state lifetime studies have been performed on Er3+-doped-TeO 2-WO3-Na2O-Nb2O5 glass system. Therefore, we decided to study the Ei3+ excited states lifetimes and compared with the Judd-Ofelt theory predictions. We measured only the 4I13/2 to 4I15/2 transitions lifetimes. The other transitions lifetimes can be inferred by knowing the Ω2, Ω4, Ω6 Judd-Ofelt parameters. These parameters were calculated with the electric-magnetic dipole transition oscillator strength for the desired excited levels and ground state obtained from the optical absorption spectra. After performing this calculation we estimated that maximum quantum efficiency (η), measured/calculated lifetimes ratio, would be achieved at 7500ppm (%wt) Er3+ content.|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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