Dysprosium-doped YAl3(BO3)4 (YAB) crystals: An investigation of radiative and non-radiative processes

G. Dominiak-Dzik, P. Solarz, W. Ryba-Romanowski, E. Beregi, L. Kovács

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Abstract

The absorption, emission spectra and lifetime of the 4F 9/2 fluorescent level of Dy3+ in YAl3(BO 3)4 crystal were investigated. Energy level structure was constructed from absorption and emission spectra recorded at 5 K. The measured oscillator strengths of the transitions between the J manifolds at 300 K were compared with those derived from the Judd-Ofelt theory. The radiative transition rates and radiative lifetimes were calculated. Although there are several transitions originating in the 4F9/2 level a major part of emission intensity is contained in the 4F 9/26H13/2 transition. Measurement of selfquenching of the 4F9/2 luminescence provided a parameter characterizing an activator-activator interaction, which may be used to predict an optimal Dy3+ concentration. The narrow and polarization dependent emission lines, relatively long lifetime of the 4F9/2 metastable level (τ=520 μs) and its high quantum efficiency are advantageous for low threshold laser action in both CW and pulsed operation. The emission cross-section of a potential laser line at 570 nm connected with 4F9/26H 13/2 transition was estimated.

Original languageEnglish
Pages (from-to)51-58
Number of pages8
JournalJournal of Alloys and Compounds
Volume359
Issue number1-2
DOIs
Publication statusPublished - Sep 22 2003

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Keywords

  • Luminescence
  • Optical materials
  • Optical spectroscopy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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