From Event: SPIE Commercial + Scientific Sensing and Imaging, 2017
An improvement in light confinement in sapphire fiber is obtained by employing nanoporous alumina as a cladding. The
fabrication strategy entails freeze-coating metal Al on sapphire fiber and its subsequent anodization to form alumina
cladding with highly organized nanopore channels vertically aligned to the fiber axis with dimensions of ~20 nm. We
investigated the confinement dependence on the porosity of the cladding, showing an improvement in comparison to
unclad sapphire fibers. The versatility of anodized alumina cladding with tunable structural and optical characteristics
has the potential to enable a new class of specialty sapphire optical fibers by engineering the light propagation for new
Hui Chen, Zsolt L. Poole, Paul Ohodnicki, and Henry Du, "Improvement of light confinement in nanostructured sapphire optical fibers," Proc. SPIE 10208, Fiber Optic Sensors and Applications XIV, 102080A (Presented at SPIE Commercial + Scientific Sensing and Imaging: April 11, 2017; Published: 27 April 2017); https://doi.org/10.1117/12.2262663.
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