Tailoring the nanostructure of anodic aluminum oxide cladding on optical fiber

Kai Liu, Yiwei Ma, Henry Du

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We report a comprehensive investigation of fabricating nanostructured anodic aluminum oxide (AAO) cladding on optical fiber. We show that the pore size and interpore distance in the AAO cladding with pore channels vertically aligned to fiber surface can be readily controlled by applied voltage, the type, and concentration of electrolytic acid during anodization of aluminum-coated optical fiber. The structural characteristics of the AAO cladding were examined by scanning electron microscopy (SEM) and analyzed using ImageJ software. Processing maps correlating AAO growth and anodization parameters were established. Compared to planar AAO growth on aluminum foil, higher growth rate as well as larger pore diameter and interpore distance were observed for AAO cladding formation on optical fiber under identical anodization conditions due to circumferential tensile stress in the AAO growth front at the convex AAO/aluminum interface. This tensile stress also contributed to radial cracking of the AAO cladding upon exceeding some threshold thickness.

Original languageEnglish
Pages (from-to)5836-5845
Number of pages10
JournalJournal of the American Ceramic Society
Volume101
Issue number12
DOIs
StatePublished - Dec 2018

Keywords

  • anodic aluminum oxide
  • anodization parameter
  • interpore distance
  • optical fiber
  • pore diameter

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