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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ohishi, Y.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2019Ultrahigh-pressure form of Si O2 glass with dense pyrite-type crystalline homologycitations
- 2016Filamentation-induced spectral broadening and pulse shortening of infrared pulses in Tellurite glasscitations
- 2014Waveguides in Ni-doped glass and glass-ceramic written with a 1 kHz femtosecond lasercitations
- 2013On the analogy between photoluminescence and carrier-type reversal in Bi- and Pb-doped glassescitations
- 2012Investigation of Erbium-doped tellurite glasses for a planar waveguide power amplifier at 1.57 microns
- 2012Direct laser writing of relief diffraction gratings into a bulk chalcogenide glasscitations
- 2012Er-doped Tellurite glasses for planar waveguide power amplifier with extended gain bandwidthcitations
- 2010The efficiencies of energy transfer from Cr to Nd ions in silicate glassescitations
- 2009Ultrabroad emission from a bismuth doped chalcogenide glasscitations
- 2005Raman spectroscopic studies of quaternary tellurite glasses containing Nb2O5 and Ta2O5
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article
The efficiencies of energy transfer from Cr to Nd ions in silicate glasses
Abstract
The efficiency of energy transfer from Cr to Nd in silicate glasses has been examined in order to develop a gain medium for high-efficiency solar pumped fiber lasers (SPFLs). The internal quantum efficiency (QE) of the emission from the 4T2 state of Cr in Cr-doped glasses and from the 4F3/2 state of Nd in Nd-doped and Nd,Cr codoped glasses was measured using an integrating sphere. For Cr-doped and Nd,Cr codoped glasses, 650 nm excitation was used. For Nd-doped glasses, 808 nm excitation was used. The QE of Cr-doped glass (η Cr) was 7.5 % for 0.05 mol.% Cr2O3, the QE decreased monotonically with increasing Cr2O3 content. The QE of the Nd-doped glass (η Nd) has a maximum of 43% at 0.2 mol.% Nd2O3. We suggest that absorption of host glass could lower the QE at the low content side of the maximum. The QE of Nd emission in Nd,Cr codoped glass (η Nd,Cr) excited at 650 nm, which excites the 4A2→4T2 transition of Cr was 5.7 % for 0.05 mol.% Cr2O3 and 0.2 mol.% Nd2O3 content. The energy transfer quantum efficiency, η tr, from Cr to Nd which is defined as the ratio of the η Cr and the η Nd,Cr was calculated from the obtained QEs. The largest η tr was 13.4 % at 0.01 mol.% Cr2O3, and decreased with increasing Cr2O3 when content of Nd2O3 was fixed by 0.2 mol.%. This tendency is quite similar to the QEs of the Cr emission in Cr-doped glasses. Thus an increase in the QE of Cr maybe essential to increase the η tr.