TITLE

Strengthened solid-state laser materials

AUTHOR(S)
Marion, J.
PUB. DATE
October 1985
SOURCE
Applied Physics Letters;10/1/1985, Vol. 47 Issue 7, p694
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The tensile fracture strength of crystalline materials for high average power lasers has been increased by a factor of 15 using deep chemical polishing. Samples of gadolinium scandium gallium garnet, gadolinium gallium garnet, and yttrium aluminum garnet, which were prepared by conventional mechanical techniques to a high quality polish, were found to contain subsurface damage up to 50 μm in depth. When this damage was removed by deep chemical etching, the mean strength of small, four-point flexure specimens increased from 155 to 2280 MPa; however, these samples were no longer optically flat after etching. Specimens in which the optical figure was restored by polishing after the etch had an intermediate strength of 630 MPa.
ACCESSION #
9818255

 

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