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Upconversion assisted self-pulsing in a high-concentration erbium doped fibre laser

100%
Sergeyev S., O’Mahoney K., Popov S., Friberg A.
Open Physics
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2010
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vol. 8
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issue 2
159-163
EN
We report results on experimental and theoretical characterisation of self-pulsing in high concentration erbium doped fibre laser which is free from erbium clusters. Unlike previous models of self-pulsing accounting for pair-induced quenching (PIQ) on the clustered erbium ions, new model has been developed with accounting for statistical nature of the excitation migration and upconversion and resonance-like pumpto-signal intensity noise transfer. The obtained results are in a good agreement with the experimental data.
2
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Growth and EPR properties of KSm(WO4)2 and KEr(WO4)2 single crystals

100%
Leniec G., Skibiński T., Kaczmarek S., Iwanowski P., Berkowski M.
Open Physics
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2012
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vol. 10
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issue 2
500-505
EN
Growth conditions and electron paramagnetic resonance investigations of two well oriented KSm(WO4)2 and KEr(WO4)2 single crystals have been presented and discussed. Hyperfine structure of Sm3+ ion was detected and analyzed for angular and temperature dependences. EPR spectra of KEr(WO4)2 and its angular dependence showed the presence of 5 magnetically nonequivalent Er centers in the crystal. A change in the type of magnetic interactions was analyzed using mixed (Gaussian and Lorentzian) fits of the EPR spectra.
3
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Growth and EPR properties of ErVO4single crystals

100%
Leniec G., Kaczmarek S. M., Berkowski M., Głowacki M., Skibiński T., Bojanowski B.
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issue 3
405-410
EN
Single crystals of ErVO4 were grown by the Czochralski method under ambient pressure in a nitrogen atmosphere. Obtained crystals were transparent with strong pink coloring. Electron paramagnetic resonance (EPR) spectra were recorded as a function of the applied magnetic field. Temperature and angular dependences of the EPR spectra of the samples in the 3–300 K temperature range were analyzed applying both Lorentzian––Gauss approximation for diluted medium and Dyson for dense magnetic medium. EPR-NMR program was done to find local symmetry and spin Hamiltonian parameters of erbium ions.
4
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Mechanical alloying of Mg-Zn-Ca-Er alloy

88%
Hrapkowicz B., Lesz S., Kremzer M., Karolus M., Pakieła W., Hrapkowicz B., Lesz S., Kremzer M., Karolus M., Pakieła W.
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2021
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