Nanostructured sapphire optical fiber for sensing in harsh environments

Hui Chen, Kai Liu, Yiwei Ma, Fei Tian, Henry Du

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

10 Scopus citations

Abstract

We describe an innovative and scalable strategy of transforming a commercial unclad sapphire optical fiber to an allalumina nanostructured sapphire optical fiber (NSOF) that overcomes decades-long challenges faced in the field of sapphire fiber optics. The strategy entails fiber coating with metal Al followed by subsequent anodization to form anodized alumina oxide (AAO) cladding of highly organized pore channel structure. We show that Ag nanoparticles entrapped in AAO show excellent structural and morphological stability and less susceptibility to oxidation for potential high-temperature surface-enhanced Raman Scattering (SERS). We reveal, with aid of numerical simulations, that the AAO cladding greatly increases the evanescent-field overlap both in power and extent and that lower porosity of AAO results in higher evanescent-field overlap. This work has opened the door to new sapphire fiber-based sensor design and sensor architecture.

Original languageEnglish
Title of host publicationMicro- and Nanotechnology Sensors, Systems, and Applications IX
EditorsAchyut K. Dutta, M. Saif Islam, Thomas George
ISBN (Electronic)9781510608894
DOIs
StatePublished - 2017
EventMicro- and Nanotechnology Sensors, Systems, and Applications IX 2017 - Anaheim, United States
Duration: 9 Apr 201713 Apr 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10194
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceMicro- and Nanotechnology Sensors, Systems, and Applications IX 2017
Country/TerritoryUnited States
CityAnaheim
Period9/04/1713/04/17

Keywords

  • anodized aluminum oxide
  • cladding
  • harsh environment
  • sapphire fiber
  • surface-enhanced Raman scattering

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