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Mid-infrared fluorescence of Y2O3and Nb2O5modified germanate glasses doped with Er3+pumped by 808 nm LD

Authors
Journal
Optical Materials
0925-3467
Publisher
Elsevier
Volume
36
Issue
8
Identifiers
DOI: 10.1016/j.optmat.2014.03.026
Keywords
  • Mid-Infrared
  • Energy Transfer
  • Germanate Glass
  • Fluorescence
Disciplines
  • Physics

Abstract

Abstract Er3+ doped germanate glasses modified by Y2O3 and Nb2O5 have been prepared. A detailed discussion of J–O parameters has been carried out based on absorption spectra and Judd–Ofelt theory. Mid-infrared transmittance spectra and 2.7μm emission properties have been investigated. To understand 2.7μm fluorescence behaviors, 1.53μm emission spectra, radiative lifetimes, non-radiative relaxation rate constants of the 4I11/2→4I13/2 transition and energy transfer coefficients of 4I13/2 level have been obtained and discussed. As a result, the investigated samples with excellent spectroscopic properties might be appropriate optical materials for mid-infrared laser and amplifier applications.

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