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RESEARCH PRODUCT

Inelastic neutron and low-frequency Raman scattering in a niobium-phosphate glass for Raman gain applications

Alfons SchulteTobias UnruhY. GuoB. SchmidWalter SchirmacherWalter Schirmacher

subject

Raman amplificationChemistryAnalytical chemistryNeutron scatteringCondensed Matter PhysicsMolecular physicsInelastic neutron scatteringElectronic Optical and Magnetic Materialssymbols.namesakeX-ray Raman scatteringRaman coolingMaterials ChemistryCeramics and CompositessymbolsCoherent anti-Stokes Raman spectroscopyRaman spectroscopyRaman scattering

description

Abstract We present measurements of the vibrational spectrum of a binary niobium-phosphate glass in the THz frequency range using inelastic neutron and Raman scattering. The spectra of these glasses show a low-frequency enhancement of the vibrational density of states (“boson peak”). Using a recently developed theory of vibrational excitations in disordered solids we are able to reconcile the measured neutron and Raman spectra using fluctuating elastic and Pockels constants as a model concept. As the spontaneous Raman susceptibility is a key parameter for Raman amplification our results suggest a significant gain profile for application of niobium-phosphate glasses in Raman amplifiers.

yearjournalcountryeditionlanguage
2011-01-01Journal of Non-Crystalline Solids
https://doi.org/10.1016/j.jnoncrysol.2010.06.073