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Proceedings Paper

Thermo-chemical strengthening of Nd:YAG laser rods
Author(s): Revital Feldman; Yehoshua Shimony; Steven Jackel; Izhak Levy; Yuval Golan
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Paper Abstract

High power Nd:YAG laser rods may easily exceed their fracture strength as a result of thermally induced tensile stress. Strengthening of such rods is achievable by wet chemical etching in concentrated orthophosphoric acid, or in a mixture of phosphoric and sulfuric acids, at elevated temperatures. In the present study, the etching rates of Nd:YAG in both etchants were determined as a function of temperature. The calibration curves thus obtained enabled the controlled removal of the outer "damaged" layer of lasing elements. Four-point flexture strength measurements were performed on deep etched and on non-etched YAG slabs. The measurements showed a 3.5 fold increase in the strength of the etched slabs. Weibull analysis treatment was done on the basis of our fracture data.

Paper Details

Date Published: 17 April 2006
PDF: 10 pages
Proc. SPIE 6190, Solid State Lasers and Amplifiers II, 619019 (17 April 2006); doi: 10.1117/12.667983
Show Author Affiliations
Revital Feldman, Soreq NRC (Israel)
Yehoshua Shimony, Soreq NRC (Israel)
Steven Jackel, Soreq NRC (Israel)
Izhak Levy, Soreq NRC (Israel)
Yuval Golan, Ben Gurion Univ. of the Negev (Israel)

Published in SPIE Proceedings Vol. 6190:
Solid State Lasers and Amplifiers II
Alphan Sennaroglu, Editor(s)

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