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Growth of tetragonal BaTiO3 single crystal fibers

Published online by Cambridge University Press:  31 January 2011

M. Saifi ,
B. Dubois ,
E.M. Vogel  and
F.A. Thiel
M. Saifi
Affiliation:
Bell Communications Research, Murray Hill, New Jersey 07974
B. Dubois
Affiliation:
Bell Communications Research, Murray Hill, New Jersey 07974
E.M. Vogel
Affiliation:
Bell Communications Research, Murray Hill, New Jersey 07974
F.A. Thiel
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974
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Abstract

With the increasing use of optical fibers in the telecommunication network, there is need for fiber geometry compatible optical devices such as optical amplifiers, switches, couplers, and isolators. These active devices are based on field-dependent material properties, such as electrooptic and magneto-optic effects, which are stronger in single crystal than in amorphous materials. Single crystal fibers can be grown by the laser heated pedestal growth (LHPG) technique. In this paper we report the growth of single crystal fibers of ferroelectric barium titanate from sintered ceramic rods of stoichiometric barium titanate. Barium titanate is one of the most extensively investigated ferroelectric materials. However, its growth from stoichiometric melt always results in its hexagonal nonferroelectric phase. Using LHPG, single crystal strontium titanate seed, and sintered ceramic barium titanate rods, we have succeeded in growing single crystal fibers (∼ 100 μ m diameter) of pure barium titanate with tetragonal (ferroelectric) crystal structure. This paper discusses growth and characterization of these fibers.

Type
Articles
Information
Journal of Materials Research , Volume 1 , Issue 3 , June 1986 , pp. 452 - 456
Copyright
Copyright © Materials Research Society 1986

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References

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