Optical parameters of NaY(WO4)2 crystals doped with Pr and Ho

Zh X. Cheng, Sh J. Zhang, J. R. Han, H. Ch Chen, Q. M. Lu, H. C. Guo

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11 Scopus citations

Abstract

Rare-earths (Pr, Ho) doped double tungstates NaY(WO4)2 crystals were prepared by using Czochralski (CZ) pulling method. Their absorption spectra have been measured in the region 300-2000nm at room temperature. A band gap of eigentransition of 3.92eV was obtained. The three phenomenological parameters were calculated through fitting of the calculated and measured oscillator strengths. J-O theory was used to evaluate the spontaneous emission probabilities, stimulated emission cross sections, branch ratios and energy level lifetimes of some useful transitions of Ho3+ ions in NaY(WO4)2 crystals. The obtained three phenomenological J-O intensity parameters Ω1 are Ω2=2.17×10-19, Ω4=1.58×10-19, Ω6=3.24×10-20 for pr3+; Ω2=1.64×10-19, Ω4=7.43×10-20, Ω6= 1.60×10-20for Ho3+.

Original languageEnglish (US)
Pages (from-to)449-455
Number of pages7
JournalCrystal Research and Technology
Volume36
Issue number4-5
DOIs
StatePublished - Jul 24 2001

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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