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Proceedings Paper

Development of a large-scale Nd:YAG growth process
Author(s): E. Wayne O'Dell; David J. Nelson; D. Narasimhan; Robert C. Morris; John E. Marion
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Paper Abstract

Development of an automated steady-state process for Czochralski growth of flat interface Nd:YAG laser crystals is described. Steady-state is achieved through addition to the melt to maintain constant melt depth and composition. Interface flattening is accomplished through a controlled spin-up of crystal rotation during which characteristic changes in melt flow and crystal weight are observed. Combined steady-state/flat-interface growth has been demonstrated for sections up to 30 mm diameter x 110 mm long. In batch mode, without melt addition, flat interface YAG and Nd:YAG up to 52 mm x 220 mm, and undoped YAG up to 85 mm x 75 mm have been grown. In batchmode, gradual reduction of rotation rate is required to maintain interface contour and cross-sectional shape of the crystal as the melt height decreases.

Paper Details

Date Published: 1 April 1990
PDF: 9 pages
Proc. SPIE 1223, Solid State Lasers, (1 April 1990); doi: 10.1117/12.18401
Show Author Affiliations
E. Wayne O'Dell, Allied-Signal, Inc. (United States)
David J. Nelson, Allied-Signal, Inc. (United States)
D. Narasimhan, Allied-Signal, Inc. (United States)
Robert C. Morris, Allied-Signal, Inc. (United States)
John E. Marion, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 1223:
Solid State Lasers
George Dube, Editor(s)

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