Improvement of light confinement in nanostructured sapphire optical fibers

Hui Chen, Zsolt L. Poole, Paul Ohodnicki, Henry Du

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

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 sensor development.

Original languageEnglish
Title of host publicationFiber Optic Sensors and Applications XIV
EditorsChristopher S. Baldwin, Gary Pickrell, Jerry J. Benterou, Eric Udd, Anbo Wang, Henry H. Du
ISBN (Electronic)9781510609174
DOIs
StatePublished - 2017
EventFiber Optic Sensors and Applications XIV 2017 - Anaheim, United States
Duration: 11 Apr 201712 Apr 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10208
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceFiber Optic Sensors and Applications XIV 2017
Country/TerritoryUnited States
CityAnaheim
Period11/04/1712/04/17

Keywords

  • Anodized Aluminum Oxide
  • Far-Field Beam Profile
  • Light Confinement
  • Optical Fiber Cladding
  • Single-Crystal Sapphire Fiber

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