JEEP 2009, 00021 (2009)
DOI: 10.1051/jeep/200900021

Growth by µ-PD and LHPG and Characterization by Raman Spectroscopy of Potassium Lithium Niobate (KLN) Single-Crystal Fibers

N. Kozhaya¹, M. Ferriol¹, M. Cochez¹, M. Aillerie¹ and G. Maxwell<sup>2

1</sup>  Laboratoire Matériaux Optiques, Photonique et Systèmes ex-U.M.R. C.N.R.S. 7132, Université Paul Verlaine Metz, Supélec Département Chimie I.U.T. de Moselle Est 12 rue Victor Demange, BP 80105 - 57500 Saint-Avold – France
²  Shasta Crystals, 3350 Scott Blvd., Bldg 1 (Finesse), Santa Clara, CA 95054 (USA)

nader.kozhaya@univ-metz.fr

Published online: 4 December 2009

Abstract
Homogeneous crack-free KLN and Mg:KLN single-crystal fibers with the general formula K₃Li_2-xNb_5+xO_15+2x were grown by the LHPG and μ-PD techniques using pulling rates between 0.25 and 0.4 mm.min^-1 . The fibers were obtained with a diameter up to 600 μm and length up to 14 cm for 0<x<0.3. Their characterization by micro-Raman spectroscopy showed their homogeneous composition all along the growth axis. The evolution of the lattice vibration spectra as a function of composition was related to the increase of the structural disorder when the amount of Li₂O decreases.

Key words: KLN -- Potassium Lithium Niobate -- Single Crystal -- Micro-Pulling Down Technique -- Laser Heated Pedestal Growth -- Lattice vibration -- Raman spectroscopy


© Owned by the authors, published by EDP Sciences 2009