The University of Southampton
University of Southampton Institutional Repository

Leaky modes in microstructured optical fibres with annular sectors

Leaky modes in microstructured optical fibres with annular sectors
Leaky modes in microstructured optical fibres with annular sectors
Microstructured or holey optical fibres are a novel class of fibres that have attracted much interest recently because they can be tailored to have properties (dispersion, nonlinearity, mode size) very different from conventional fibres. These structures can consist exclusively of air holes arranged around a solid core region in a uniform background. Since such fibres do not have any raised index regions, they cannot support true bound modes. They can, however, possess leaky modes where the light is trapped within a region surrounded by air holes. Such modes suffer confinement losses due to energy leakage between and through the holes. The confinement loss is given by the imaginary part of the complex effective mode index neff. Existing basis function expansion (Galerkin) techniques (using plane waves [1] or Hermite-Gaussians [2]) give most modal properties except for the confinement loss. Methods such as BPM can be used to find confinement loss [3] but are numerically intensive; and, recently, a multipole method has been used which is restricted to circular holes [4]. The technique presented here has the simplicity of a Galerkin technique but can also find confinement loss and complements existing methods by applying to a holes in the shape of annular sectors. Typical structures are shown below.& more ...
Poladian, L.
db563307-0e46-46d6-8241-00ac7312dffe
Monro, T.M.
4f0295a8-d9ec-45a5-b72b-72908f2549bb
Poladian, L.
db563307-0e46-46d6-8241-00ac7312dffe
Monro, T.M.
4f0295a8-d9ec-45a5-b72b-72908f2549bb

Poladian, L. and Monro, T.M. (2001) Leaky modes in microstructured optical fibres with annular sectors. ACOLS 2001, Brisbane, Australia. 03 - 06 Dec 2001.

Record type: Conference or Workshop Item (Paper)

Abstract

Microstructured or holey optical fibres are a novel class of fibres that have attracted much interest recently because they can be tailored to have properties (dispersion, nonlinearity, mode size) very different from conventional fibres. These structures can consist exclusively of air holes arranged around a solid core region in a uniform background. Since such fibres do not have any raised index regions, they cannot support true bound modes. They can, however, possess leaky modes where the light is trapped within a region surrounded by air holes. Such modes suffer confinement losses due to energy leakage between and through the holes. The confinement loss is given by the imaginary part of the complex effective mode index neff. Existing basis function expansion (Galerkin) techniques (using plane waves [1] or Hermite-Gaussians [2]) give most modal properties except for the confinement loss. Methods such as BPM can be used to find confinement loss [3] but are numerically intensive; and, recently, a multipole method has been used which is restricted to circular holes [4]. The technique presented here has the simplicity of a Galerkin technique but can also find confinement loss and complements existing methods by applying to a holes in the shape of annular sectors. Typical structures are shown below.& more ...

Text
2305.pdf - Author's Original
Download (105kB)

More information

Published date: 2001
Additional Information: Th(b)3
Venue - Dates: ACOLS 2001, Brisbane, Australia, 2001-12-03 - 2001-12-06

Identifiers

Local EPrints ID: 17120
URI: http://eprints.soton.ac.uk/id/eprint/17120
PURE UUID: 9642b54a-f418-47ee-ad64-48afac302fe1

Catalogue record

Date deposited: 16 Sep 2005
Last modified: 11 Dec 2021 14:11

Export record

Contributors

Author: L. Poladian
Author: T.M. Monro

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×