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### Proceedings Paper

Anderson localized modes in a disordered glass optical fiber
Author(s): Salman Karbasi; Seyedrasoul Hosseini; Karl W. Koch; Thomas Hawkins; John Ballato; Arash Mafi
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Paper Abstract

A beam of light can propagate in a time-invariant transversely disordered waveguide because of transverse Anderson localization. We developed a disordered glass optical ber from a porous artisan glass (satin quartz). The refractive index pro le of the disordered glass optical ber is composed of a non-uniform distribution of air voids which can be approximated as longitudinally invariant. The ll-fraction of air voids is higher at the regions closer to the boundary compared with the central regions. The experimental results show that the beam radius of a localized beam is smaller at the regions closer to the boundary than the one at the central regions. In order to understand the reason behind these observations, the fully vectorial modes of the disordered glass ber are calculated using the actual scanning electron microscope image of the ber tip. The numerical calculations show that the modes at regions closer to the boundary of the ber are more localized compared with the modes at the central regions. Coupling of an input beam to the less-localized modes with large tails at the central regions of the ber results in a large beam radius. In comparison, a beam of light launched at the regions close to the boundary couples to the highly compact modes of the ber and results in a small localized beam radius.

Paper Details

Date Published: 19 February 2014
PDF: 7 pages
Proc. SPIE 8994, Photonic and Phononic Properties of Engineered Nanostructures IV, 899420 (19 February 2014); doi: 10.1117/12.2039773
Show Author Affiliations
Salman Karbasi, Univ. of Wisconsin-Milwaukee (United States)
Seyedrasoul Hosseini, Univ. of Wisconsin-Milwaukee (United States)
Karl W. Koch, Corning Incorporated (United States)
Thomas Hawkins, Clemson Univ. (United States)
John Ballato, Clemson Univ. (United States)
Arash Mafi, Univ. of Wisconsin-Milwaukee (United States)

Published in SPIE Proceedings Vol. 8994:
Photonic and Phononic Properties of Engineered Nanostructures IV
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)