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Co-casting and optical characteristics of transparent segmented composite Er:YAG laser ceramics

Published online by Cambridge University Press:  31 January 2011

Venkatraman Gopalan
Affiliation:
Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
Charles Kraisinger
Affiliation:
AMDC, II-VI Incorporated, Saxonburg, Pennsylvania 16056
Mark Dubinskii
Affiliation:
U.S. Army Research Laboratory, RDRL-SEE-O, Adelphi, Maryland 20783
Gregory J. Quarles
Affiliation:
VLOC, II-VI Incorporated, New Port Richey, Florida 34655
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Abstract

A novel colloidal co-casting process was developed to fabricate laser quality, multisegment composite ceramic laser gain materials. The approach was demonstrated for a three segment transparent composite rod 62 mm long by 3 mm diameter consisting of undoped yttrium aluminus garnet (YAG), 0.25% Er:YAG, and 0.5% Er:YAG. The Er concentration profile in the composite has steep, controllable gradients at the segment interfaces, while maintaining constant dopant concentrations within each segment. The composite rod has 84% transmittance at 1645 nm (the lasing wavelength) with a scatter loss of 0.4% cm−1. Laser operation of such a composite Er:YAG ceramic rod was demonstrated for the first time, with nearly equivalent lasing behavior to an Er:YAG single crystal rod.

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Articles
Copyright
Copyright © Materials Research Society 2010

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Co-casting and optical characteristics of transparent segmented composite Er:YAG laser ceramics
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