Optical spectroscopy of TeO2–GeO2 glasses activated with Er3+ and Tm3+ ions

Mattarelli, Maurizio; Chiappini, Andrea; Montagna, M.; Martucci, Alessandro; Ribaudo, A.; Guglielmi, Massimo; Ferrari, M.; Chiasera, Alessandro

doi:10.1016/j.jnoncrysol.2005.04.010

Cited by 47 publications

(29 citation statements)

References 18 publications

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“…Tellurite glasses have been extensively investigated in the past several years due to their advantages such as lower maximum phonon energies (<800 cm −1 ) among oxide glasses, higher refractive indices, larger dielectric constants, better glass stability and perfect rare-earth ion solubility [24][25][26]. However, the research enthusiasm turns to heavy metal and gallate glass hosts now due to their lowest phonon energies in all oxide glass systems.…”

Section: Introductionmentioning

confidence: 99%

Powerful visible upconversion fluorescence of Er3+ in novel bismuth gallate glasses compared with in common tellurite glasses

Yang

Lin

et al. 2008

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Powerful visible upconversion fluorescence of Er3+ in novel bismuth gallate glasses compared with in common tellurite glasses

Yang

Lin

et al. 2008

Journal of Alloys and Compounds

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“…Glasses can be drawn in the form of fibers. Rare-earth ion doped glasses are being investigated thoroughly for different applications [11,[13][14][15][16][17][18]. Here we are investigating a mixed glass doped with Er 3+ for energy upconversion studies.…”

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confidence: 99%

Energy upconversion in erbium doped sodium lead germano tellurite glass

Bommareddi

Dokhanian

Reddy

2009

Phys. Status Solidi (c)

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Erbium doped sodium lead germano tellurite glass was prepared by the melt quenching technique. Optical characterization of the material was done using absorption and laser induced fluorescence measurements. Energy upconversion signals were observed from the sample at 415 nm and/or 546 nm under 488 or 806 nm laser excitations. Our results indicate that this material is useful for upconversion laser development. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…CLC numbers: TB383 Document code: A Article ID: 1673-1905(2007)03-0188-04 DOI Brillouin and Raman spectroscopies (BS and RS), by exploiting the interaction between light and vibrations, are powerful non-destructive techniques extensively used in pure and applied research to characterize materials. Systems in different state of aggregation, liquids, solids and gases can be studied by RS and BS [1][2][3][4][5][6][7] . Also, single molecules have been studied by surface enhanced Raman scattering [8] .…”

mentioning

confidence: 99%

“…Also, single molecules have been studied by surface enhanced Raman scattering [8] . The Raman and Brillouin spectra give information on the structure of crystals, glasses and glass-ceramics, show the nature of bonds and give insight on the elastic inhomogeneities caused by pores, nanoparticles and phase separation on various length scales [1,2,6] . In particular RS is a very useful analytic tool, since the vibrating molecular groups (Raman active) have characteristic frequencies.The analysis is also quantitative, the scattered light being proportional to the concentration of such groups.…”

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confidence: 99%

Diagnostic techniques for photonic materials based on Raman and Brillouin spectroscopies

Mattarelli

Caponi

Chiappini

et al. 2007

Optoelectron. Lett.

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The elastic and vibrational properties of a material, bulk or planar waveguide, are studied by Brillouin and Raman spectroscopy to follow the process of nanocrystals growth in glass-ceramics. The nanoparticles cause the appearance, in the low frequency Raman spectrum, of characteristic peaks, whose position depends on the size of the crystals. At the same time, sharp crystal peaks, due to optical phonons, appear in the Raman spectra, allowing the determination of the nucleated phase, and a frequency shift of the Brillouin peaks is observed. CLC numbers: TB383 Document code: A Article ID: 1673-1905(2007)03-0188-04 DOI Brillouin and Raman spectroscopies (BS and RS), by exploiting the interaction between light and vibrations, are powerful non-destructive techniques extensively used in pure and applied research to characterize materials. Systems in different state of aggregation, liquids, solids and gases can be studied by RS and BS [1][2][3][4][5][6][7] . Also, single molecules have been studied by surface enhanced Raman scattering [8] . The Raman and Brillouin spectra give information on the structure of crystals, glasses and glass-ceramics, show the nature of bonds and give insight on the elastic inhomogeneities caused by pores, nanoparticles and phase separation on various length scales [1,2,6] . In particular RS is a very useful analytic tool, since the vibrating molecular groups (Raman active) have characteristic frequencies.The analysis is also quantitative, the scattered light being proportional to the concentration of such groups.In optoelectronics, these investigation techniques are widely used both for characterizing crystals, as, for instance, to assess the stoichiometry of LiNbO3 with high resolution [9] , or glasses. RS constitutes the main technique to investigate the structure of glasses, lacking the information that Xray diffraction may give for crystals. RS with waveguided excitation in a mode of a planar waveguide (WG) has the advantage of obtaining information only on the region of interest, avoiding the contribution of the substrate. Moreover, in a graded index WG, different guided modes propagate at different depths in the guiding film leading to a depth-selective spectroscopic characterization of a WG by RS and BS [10,13] .In a light scattering experiment, the spectral density of the scattered light is given bywhere q and are the exchanged wavevector and energy, respectively and is the fluctuation of the dielectric constant. The inelastic light scattering is due to time dependent dielectric constant fluctuations [2,12] . The fluctuations of the dielectric constant may be due to the change of the position of the scatter units and to a change of their polarizabilities, induced by the vibration. This allows to roughly distinguish the different parts of the scattered light spectrum.BS refers to the light scattered by a propagating acoustic wave, is qdependent, and is mainly caused by the displacements of the scatterers. RS refers to optical vibrations, is practically qindependent, and is mainly cau...

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Optical spectroscopy of TeO2–GeO2 glasses activated with Er3+ and Tm3+ ions

Cited by 47 publications

References 18 publications

Powerful visible upconversion fluorescence of Er3+ in novel bismuth gallate glasses compared with in common tellurite glasses

Powerful visible upconversion fluorescence of Er3+ in novel bismuth gallate glasses compared with in common tellurite glasses

Energy upconversion in erbium doped sodium lead germano tellurite glass

Diagnostic techniques for photonic materials based on Raman and Brillouin spectroscopies

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