Abstract
A new double crucible method was designed. Nearly stoichiometric lithium niobate (NSLN) crystals were grown in the lower crucible with a melt composition of [Li2O] / [Nb2O5] = 58 / 42, and it is the melt not the powder that was continuously added from the higher crucible. The composition of the adding melt is [Li2O] / [Nb2O5] = 36 / 64, far away from the stoichiomtric point of 50 / 50. Large-diametered NSLN crystals were successfully grown, and the average concertration of Li2O reaches 49.85 mol% with a radial composition deviation of ± 0.02 mol% and a axial composition deviation less than ± 0.03 mol%/cm.
© 2005 Optical Society of America
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