Spectroscopic investigations of Nd3+ ions in niobium phosphate glasses for laser applications
| Autor: | Ch. Basavapoornima, P. Manasa, C.K. Jayasankar, A.S. Joshi, T. Srihari |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Absorption spectroscopy Biophysics Gain Analytical chemistry Niobium chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Laser 01 natural sciences Biochemistry Atomic and Molecular Physics and Optics 0104 chemical sciences law.invention Ion chemistry law Figure of merit Quantum efficiency Stimulated emission 0210 nano-technology |
| Zdroj: | Journal of Luminescence. 211:233-242 |
| ISSN: | 0022-2313 |
| Popis: | Nb2O5 phosphate glasses (PNbKA: P2O5+Nb2O5+K2O + Al2O3) doped with different Nd3+ concentrations employed via melt-quenching method and their physical, thermal and spectroscopic properties were investigated. The Judd-Ofelt (JO) intensity parameters (Ωλ, λ = 2,4 and 6) and radiative properties have been evaluated for 1.0 mol % Nd3+ (PNbKANd1.0) absorption spectrum. Strong NIR emission has been observed for the 4F3/2 → 4I11/2 transition at 1.056 μm for PNbKANd glasses by the λexc of 808 nm laser. Lifetime for PNbKANd1.0 glass was found to be relatively quite longer (240 μs) for the 4F3/2 level of Nd3+ ion. The stimulated emission cross-section, quantum efficiency, gain bandwidth, figure of merit and saturation intensity have been found to be 3.69 × 10−20 cm2, 88.56 × 10−25 cm2s, 88%, 0.99 × 10−27 cm3 and 2.12 × 108 W/m2, respectively, for PNbKANd1.0 glass. The results specifies that the PNbKANd1.0 glass might be useful for laser gain media at 1.056 μm region. |
| Databáze: | OpenAIRE |
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