Polarized spectral analysis of Er3+ ions in biaxial Bi2(MoO4)3 crystal.

Authors :: Gong, X. H.
Lin, Y. F.
Chen, Y. J.
Liao, J. S.
Chen, X. Y.
Luo, Z. D.
Huang, Y. D.
Source :: Applied Physics B: Lasers & Optics; Jun2008, Vol. 91 Issue 3/4, p499-505, 7p, 5 Charts, 7 Graphs
Publication Year :: 2008
Abstract: An Er<superscript>3+</superscript>:Bi<subscript>2</subscript>(MoO<subscript>4</subscript>)<subscript>3</subscript> single crystal has been grown by the Czochralski technique. The Stark sublevels of the <superscript>4</superscript>I<subscript>15/2</subscript> and <superscript>4</superscript>I<subscript>13/2</subscript> multiplets of Er<superscript>3+</superscript> ions in the crystal were determined. The polarized absorption spectra, polarized fluorescence spectra, and fluorescence decay curve of the crystal were measured at room temperature and the relevant spectroscopic parameters, including the Judd–Ofelt intensity parameters, spontaneous emission probability, fluorescence branching ratio, radiative lifetime, and stimulated emission cross section, were estimated. The effect of re-absorption on the spectroscopic parameters was discussed. When the crystal was excited at 977 nm, up-conversion green fluorescence was observed and discussed. [ABSTRACT FROM AUTHOR]