Crystal Research and Technology
Cryst. Res. Technol. 36 (2001) 519 - Abstract -

W. S. Yang, J. H. Lee*, T. Fukuda*, D. H. Yoon

School of Metallurgical and Materials Engineering, Sungkyunkwan University, Korea
*Institute of Materials Research, Tohoku University, Japan

Micro-Pulling Down Growth of Co-doped Lithium Niobate Single Crystal Fibers According Er and Mg Contents and Photolumenescence Properties

The Er3+ doped Mg:LiNbO3 single crystal fibers employed in our experiment were grown in air by a micro-pulling down (µ -PD) method from host materials of a congruent Li/Nb (0.945) ratio which were melt-doped with a nominal molar concentration of 1, 3, 5 % MgO and 0.6 % Er2O3. The X-ray diffraction analysis results indicated that the co-doped crystals maintained the same structural characteristics as the undoped LiNbO3, however the lattice parameters with Mg differed; c (Å) value decreased, and a (Å) increased than of pure LiNbO3. The influence of dopants on the photoluminescence (PL) properties of the Er:Mg:LiNbO3 single crystal fibers excited by laser lines of 514 nm was reported. Also, the PL properties according to temperature and the excitation power of Er:Mg:LiNbO3 crystal fibers were analyzed.

Keywords: co-doped LiNbO3, micro-pulling down, structure, photoluminescence, concentration


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