Development of a large-scale Nd:YAG growth process

E. Wayne O'Dell; David J. Nelson; D. Narasimhan; Robert C. Morris; John E. Marion

doi:10.1117/12.18401

1 April 1990 Development of a large-scale Nd:YAG growth process

E. Wayne O'Dell, David J. Nelson, D. Narasimhan, Robert C. Morris, John E. Marion

Proceedings Volume 1223, Solid State Lasers; (1990) https://doi.org/10.1117/12.18401
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

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.

Citation Download Citation

E. Wayne O'Dell, David J. Nelson, D. Narasimhan, Robert C. Morris, and John E. Marion "Development of a large-scale Nd:YAG growth process", Proc. SPIE 1223, Solid State Lasers, (1 April 1990); https://doi.org/10.1117/12.18401

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