Strength enhancement of single crystal laser components

Abstract

The effect of chemical etching on the surface roughness and fracture strength of Nd:yttrium-aluminum-garnet single crystals was investigated. Etching the laser host material in a 1:1 mixture of concentrated sulfuric and phosphoric acid at elevated temperatures enabled material removal from the surface of laser rods cored from single-crystal boules. The roughness on the rod surface increased from the as-drilled condition after etching, but after 17 μm of material was removed, the roughness remained approximately constant. The modulus of rupture increased from 133-530 MPa when 87 μm of material was removed by the chemical etching procedure.

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Correspondence to D. F. Bahr.

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Shafer, K.E., Eakins, D.E., Bahr, D.F. et al. Strength enhancement of single crystal laser components. Journal of Materials Research 18, 2537–2539 (2003). https://doi.org/10.1557/JMR.2003.0353

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