New tungstate fluorophosphate glasses

Poirier, Gaël; Poulain, Marcel; Messaddeq, Younès; Ribeiro, Sidney J. L.

doi:10.1016/j.jnoncrysol.2004.11.017

Cited by 75 publications

(49 citation statements)

References 35 publications

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“…[16][17][18][19], demonstrate the large potential of the TFP glass for photonic applications. A patent was recently deposited 24 where the effect of two-photon absorption in TFP glass was exploited for three-dimensional ͑3D͒ optical storage.…”

Section: Discussionmentioning

confidence: 93%

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Optical properties and energy transfer processes in (Tm3+, Nd3+) doped tungstate fluorophosphate glass

Brandão

Araújo

Poirier

et al. 2006

Journal of Applied Physics

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We investigate the linear optical properties and energy transfer processes in tungstate fluorophosphate glass doped with thulium ͑Tm 3+ ͒ and neodymium ͑Nd 3+ ͒ ions. The linear absorption spectra from 370 to 3000 nm were obtained. Transitions probabilities, radiative lifetimes, and transition branching ratios were determined using the Judd-Ofelt ͓Phys. Rev. 127, 750 ͑1962͒; J. Chem. Phys. 37, 511 ͑1962͔͒ theory. Frequency up-conversion to the blue region and fluorescence in the infrared were observed upon pulsed excitation in the range of 630-700 nm. The excitation spectra of the luminescence were obtained to understand the origin of the signals. The temporal decay of the fluorescence was measured for different concentrations of the doping ions. Energy transfer rates among the Tm 3+ and Nd 3+ ions were also determined.

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Section: Discussionmentioning

confidence: 93%

“…16 physical properties of TFP were investigated with respect to their chemical composition. Density, refractive index, and characteristic temperatures were measured.…”

Section: Introductionmentioning

confidence: 99%

Optical properties and energy transfer processes in (Tm3+, Nd3+) doped tungstate fluorophosphate glass

Brandão

Araújo

Poirier

et al. 2006

Journal of Applied Physics

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“…It is limited to 4.5 micrometers in the mid-infrared by the first overtone of the P-O vibrations, as this has been shown in fluoride glasses doped with phosphates [14,15,29].…”

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confidence: 83%

“…The spectrum is limited to 400 cm -1 , as KBr is no more transparent beyond this frequency. The comparison with bulk glass shows that the absorption observed between 1500 and 2500 cm -1 corresponds to the first overtones of the fundamental absorption bands of the PO 4 tetrahedra [14,15].…”

Section: Bulk Samplesmentioning

confidence: 95%

Fluorophosphate glasses containing manganese

Djouama

Boutarfaïa

Poulain

2008

Journal of Physics and Chemistry of Solids

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New fluorophosphate glasses based on MnF 2 , NaPO 3 and MF n (M = Zn 2+ , Sr 2+ , Mg 2+ , Ba 2+ , Li + , Na + and K + ) have been synthesised and characterized. Large vitreous areas were observed. Samples of 4 mm in thickness have been obtained. These glasses are easy to prepare and stable in ambient air. Depending on the composition and the nature of the M cation, glass transition temperature, Tg, lies between 230 and 314°C, crystallisation temperature, Tx is between 320 and 475°C. These glasses are pink coloured, and infrared transmission extends up to 4.5 m with extrinsic OH -absorption band at 3200 cm -1 and other bands around 2200 and 1600 cm -1 that relate to PO 4 tetrahedron vibration. Other physical properties including density, microhardness, Young modulus, thermal expansion and refractive index were investigated and correlated to composition.

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“…These rare earth doped materials exhibit highly efficient luminescent properties since rare earth ions tend to migrate to the heavy metal fluoride crystalline phase during heat-treatment. On the other hand, tungsten phosphate glasses based on the binary system NaPO 3 -WO 3 are well known for their great glass forming ability and very high thermal stability against devitrification due to the intermediary behavior of tungsten octahedra inside the metaphosphate network [8][9][10] . In addition, WO 3 incorporation decreases the overall phonon energy of the phosphate glass with formation of WO 6 clusters, resulting in interesting optical properties such as optical non linear absorption 11 , photochromic effects [12][13] and efficient luminescent properties when doped with rare-earth 14 .…”

Section: Introductionmentioning

confidence: 99%