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| Naji, M. |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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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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| Kočí, Jan | Prague |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Ali, M. A. |
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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.
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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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document
Er-doped Tellurite glasses for planar waveguide power amplifier with extended gain bandwidth
Abstract
Tellurite glass compositions doped with erbium and erbium/ytterbium optimised to support extended gain bandwidth with significant amplification have been fabricated, and their thermal, optical absorption, excitation and luminescence properties investigated. Each rare-earth dopant concentration was set at 1x10<sup>20</sup>/cm<sup>3</sup>. Broad emission cross-section bandwidths up to 50nm FWHM were observed, with fluorescence lifetimes of ~3ms. Collinear pump probe measurements on ~4mm thick bulk samples revealed peak gains of up to 2.1dB/cm at a wavelength of 1535nm in the co-doped material, with an incident pump intensity of only I<sub>inc</sub>~8kW/cm<sup>2</sup> at a wavelength of 974nm. At equivalent absorbed pump powers between co-doped and single doped materials the relative gain was 1.25dB/cm (I<sub>inc</sub>~4kW/cm<sup>2</sup>) and 0.9dB/cm (I<sub>inc</sub>~8kW/cm<sup>2</sup>) respectively, demonstrating efficient energy transfer from the ytterbium to erbium ions. Excited state absorption at longer wavelengths was observed and characterised and its implication on realising sufficient gain in the wavelength band of interest is discussed.