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Near-IR Luminescence of Rare-Earth Ions $(Er^{3+}$, $Pr^{3+}$, $Ho^{3+}$, $Tm^{3+}$) in Titanate–Germanate Glasses under Excitation of $Yb^{3+}$
| Content Provider | MDPI |
|---|---|
| Author | Kowalska, Karolina Kuwik, Marta Pisarska, Joanna Pisarski, Wojciech A. |
| Copyright Year | 2022 |
| Description | Inorganic glasses co-doped with rare-earth ions have a key potential application value in the field of optical communications. In this paper, we have fabricated and then characterized multicomponent $TiO_{2}$-modified germanate glasses co-doped with $Yb^{3+}/Ln^{3+}$ (Ln = Pr, Er, Tm, Ho) with excellent spectroscopic properties. Glass systems were directly excited at 980 nm (the$ $^{2}$F_{7/2}$ →$ $^{2}$F_{5/2}$ transition of $Yb^{3+}$). We demonstrated that the introduction of $TiO_{2}$ is a promising option to significantly enhance the main near-infrared luminescence bands located at the optical telecommunication window at 1.3 μm $(Pr^{3+}$:$ $^{1}$G_{4}$ →$ $^{3}$H_{5}$), 1.5 μm $(Er^{3+}$:$ $^{4}$I_{13/2}$ →$ $^{4}$I_{15/2}$), 1.8 μm $(Tm^{3+}$:$ $^{3}$F_{4}$ →$ $^{3}$H_{6}$) and 2.0 μm $(Ho^{3+}$:$ $^{5}$I_{7}$ →$ $^{7}$I_{8}$). Based on the lifetime values, the energy transfer efficiencies $(η_{ET}$) were estimated. The values of $η_{ET}$ are changed from 31% for $Yb^{3+}/Ho^{3+}$ glass to nearly 53% for $Yb^{3+}/Pr^{3+}$ glass. The investigations show that obtained titanate–germanate glass is an interesting type of special glasses integrating luminescence properties and spectroscopic parameters, which may be a promising candidate for application in laser sources emitting radiation and broadband tunable amplifiers operating in the near-infrared range. |
| Starting Page | 3660 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma15103660 |
| Journal | Materials |
| Issue Number | 10 |
| Volume Number | 15 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-05-20 |
| Access Restriction | Open |
| Subject Keyword | Materials Nuclear Energy and Engineering Quantum Science and Technology Germanate Glasses Ytterbium Ions Energy Transfer Luminescence Property Relationship |
| Content Type | Text |
| Resource Type | Article |
