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Proceedings Paper

Minimization of the surface non-uniformity of a Nd:YVO4 cylindrical bar grown by edge-defined film-fed growth (EFG) system in low-gravity environment
Author(s): Liliana Braescu; Agneta M. Balint; Robert Szabo; Stefan Balint
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Paper Abstract

In this paper the dependence of the radius of a Nd:YVO4 cylindrical bar, grown in a low-gravity environment, on the pulling rate (v), melt temperature (T0) at the meniscus basis, pressure in the furnace (p) and die radius (r0e) is found. Those values of v, T0, p and r0e are determined for which the crystal radius variation, due to small uncontrollable variations of v, T0, p around some average values, cause minimal surface non-uniformity. Numerical results are given for a Nd:YVO4 cylindrical bar grown in a furnace in which the vertical temperature gradient is k=33 K/mm. Finally, the results obtained in low-gravity environment are compared to those obtained in terrestrial conditions.

Paper Details

Date Published: 20 September 2005
PDF: 10 pages
Proc. SPIE 5912, Operational Characteristics and Crystal Growth of Nonlinear Optical Materials II, 59120M (20 September 2005); doi: 10.1117/12.613894
Show Author Affiliations
Liliana Braescu, West Univ. of Timisoara (Romania)
Agneta M. Balint, West Univ. of Timisoara (Romania)
Robert Szabo, West Univ. of Timisoara (Romania)
Stefan Balint, West Univ. of Timisoara (Romania)


Published in SPIE Proceedings Vol. 5912:
Operational Characteristics and Crystal Growth of Nonlinear Optical Materials II
Ravindra B. Lal; Donald O. Frazier, Editor(s)

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