Structural and spectroscopic characterization of nominal Yb3+:Ca8 La2 (PO4)6 O2 oxyapatite single crystal fibers grown by the micro-pulling-down method

Georges Boulon, Annabel Collombet, Alain Brenier, Marie Thérèse Cohen-Adad, Akira Yoshikawa, Kheirreddine Lebbou, Jong Ho Lee, Tsugno Fukuda

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63 Citations (Scopus)


Yb-doped Ca8La2(PO4)6O2 (CLPA) single crystals with the apatite-type structure and having <0001> orientation were grown by the micro-pulling-down (μ-PD) method. The apatite structure is represented by the monophased field of Ca8(La2-xYbx)(PO4)6O 2 (CLYPA) where it is assumed that 2 Ca2+ sites are substituted by La3+ and Yb3+ cations. Its monophased range was found to be from x = 0.0 to 0.2. The segregation of Yb3+ in CLPA single crystals and the maximum Yb3+ concentration are discussed. The crystallinity was studied using X-ray rocking curve analysis. Absorption, emission and fluorescence decay studies of Yb3+ ions in CLPA were also carried out both at low temperature and room temperature. Spectroscopic data reveal Yb3+ ion occupation within different crystallographic sites of the apatite-type structure. The potential for a diode-pumped Yb3+ laser is evaluated.

Original languageEnglish
Pages (from-to)263-270
Number of pages8
JournalAdvanced Functional Materials
Issue number4
Publication statusPublished - 2001

ASJC Scopus subject areas

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


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