| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1494639 | Optical Materials | 2014 | 7 Pages |
•Er3+ doped Y2O3 and Nb2O5 modified germanate glasses were prepared.•Spectroscopic properties and energy transfer mechanism were studied.•Non-radiative relaxation rates and energy transfer microparameters were calculated.•The prepared samples have potential applications in mid-infrared lasers.
Er3+ doped germanate glasses modified by Y2O3 and Nb2O5 have been prepared. A detailed discussion of J–O parameters has been carried out based on absorption spectra and Judd–Ofelt theory. Mid-infrared transmittance spectra and 2.7 μm emission properties have been investigated. To understand 2.7 μm fluorescence behaviors, 1.53 μm emission spectra, radiative lifetimes, non-radiative relaxation rate constants of the 4I11/2 → 4I13/2 transition and energy transfer coefficients of 4I13/2 level have been obtained and discussed. As a result, the investigated samples with excellent spectroscopic properties might be appropriate optical materials for mid-infrared laser and amplifier applications.
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