Low-frequency vibrational excitations in a niobium-phosphate glass for Raman gain applications

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Details zur Publikation

Autorinnen und Autoren: Schulte A, Guo Y, Schirmacher W, Unruh T, Cardinal T
Zeitschrift: Vibrational Spectroscopy
Jahr der Veröffentlichung: 2008
Band: 48
Heftnummer: 1
Seitenbereich: 12-15
ISSN: 0924-2031


Raman gain for all-optical amplification depends significantly on the cross section for spontaneous Raman scattering. We present measurements of the Raman spectrum of binary niobium-phosphate glasses in the frequency range from 5 to 1300 cm(-1). The spectra of these glasses show a low-frequency enhancement of the vibrational density of states ('Boson peak') suggesting a significant gain profile for application in Raman amplifiers as well as providing an additional mechanism for Raman gain. To separate the effects of density of states from the light-vibration coupling we carried out an inelastic neutron scattering investigation of 40Nb(2)O(5)-60NaPO(3) using the time-of-flight spectrometer (TOFrOF) at the FRM II neutron source in Munich. The Boson peak appears between 40 and 70 cm(-1) as an increase of the reduced density of states over the flat Debye approximation. Possible mechanisms contributing to the low-frequency excitations such as disorder-induced irregular vibrational states are discussed. (C) 2008 Elsevier B.V. All rights reserved.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Unruh, Tobias Prof. Dr.
Professur für Nanomaterialcharakterisierung (Streumethoden)

Einrichtungen weiterer Autorinnen und Autoren

Technische Universität München (TUM)
University of Central Florida (UCF)


Schulte, A., Guo, Y., Schirmacher, W., Unruh, T., & Cardinal, T. (2008). Low-frequency vibrational excitations in a niobium-phosphate glass for Raman gain applications. Vibrational Spectroscopy, 48(1), 12-15. https://dx.doi.org/10.1016/j.vibspec.2007.12.014

Schulte, Alfons, et al. "Low-frequency vibrational excitations in a niobium-phosphate glass for Raman gain applications." Vibrational Spectroscopy 48.1 (2008): 12-15.


Zuletzt aktualisiert 2018-06-08 um 20:12