The effect of periodicity on the defect modes of large mode area microstructured fibers

Flanagan, Joanne C., Amezcua, R., Poletti, F., Hayes, J.R., Broderick, N.G.R. and Richardson, D.J. (2008) The effect of periodicity on the defect modes of large mode area microstructured fibers. Optics Express, 16, (23), 18631-18645. (doi:10.1364/OE.16.018631).


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It is well known that periodic variations in refractive index can be used to create guidance in an optical fiber via photonic bandgap effects. It has also been shown that periodic structure in index-guiding microstructured fibers can lead to the guidance of additional leaky higher order modes due to bandgap effects. Here we demonstrate that this additional guidance mechanism can have important practical implications in large mode area silica microstructured fibers. We also demonstrate that similar modes can exist when a bandgap is not present and attribute this guidance to a low density of states. Excellent agreement between theoretical predictions and experimental observations is demonstrated. We explore the impact of these additional modes on the practical operation of these fibers and explore ways of minimizing their effects via the fiber geometry.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1364/OE.16.018631
ISSNs: 1094-4087 (print)
Related URLs:
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology
Q Science > QC Physics
Divisions : University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 65535
Accepted Date and Publication Date:
10 November 2008Published
Date Deposited: 18 Feb 2009
Last Modified: 31 Mar 2016 12:51

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