Low-temperature growth of DKDP for improving laser-induced damage resistance at 350 nm

Alan K. Burnham; Michael J. Runkel; Ruth A. Hawley-Fedder; M. L. Carman; Richard A. Torres; Pamela K. Whitman

doi:10.1117/12.425068

12 April 2001 Low-temperature growth of DKDP for improving laser-induced damage resistance at 350 nm

Alan K. Burnham; Michael J. Runkel; Ruth A. Hawley-Fedder; M. L. Carman; Richard A. Torres; Pamela K. Whitman;

Author Affiliations +

Proceedings Volume 4347, Laser-Induced Damage in Optical Materials: 2000; (2001) https://doi.org/10.1117/12.425068
Event: Laser-Induced Damage in Optical Materials: 2000, 2000, Boulder, CO, United States

Abstract

A set of twenty-three 20-L crystallizer runs exploring the importance of several engineering variables found that growth temperature is the most important variable controlling damage resistance of DKDP over the conditions investigated. Boules grown between 45 degree(s)C and room temperature have a 50% probability of 3(omega) bulk damage that is 1.5 to 2 times higher than boules grown between 65 and 45 degree(s)C. This raises their damage resistance above the NIF tripler specification for 8 J/cm² operation by a comfortable margin. Solution impurity levels do not correlate with damage resistance for iron less than 200 ppb and aluminum less than 2000 ppb. The possibility that low growth temperatures could increase damage resistance in NIF- scale boules was tested by growing a large boule in a 1000-L crystallizer with a supplemental growth solution tank. Four samples representing early and late pyramid and prism growth are very close to the specification as best it is understood at the present. Implications of low temperature growth for meeting absorbance, homogeneity, and other material specifications are discussed.

Citation Download Citation

Alan K. Burnham, Michael J. Runkel, Ruth A. Hawley-Fedder, M. L. Carman, Richard A. Torres, Pamela K. Whitman, "Low-temperature growth of DKDP for improving laser-induced damage resistance at 350 nm", Proc. SPIE 4347, Laser-Induced Damage in Optical Materials: 2000, (12 April 2001); doi: 10.1117/12.425068; https://doi.org/10.1117/12.425068

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