The University of Southampton
University of Southampton Institutional Repository

Hollow core large mode area fibre employing a subwavelength grating reflector

Hollow core large mode area fibre employing a subwavelength grating reflector
Hollow core large mode area fibre employing a subwavelength grating reflector
Hollow core large mode area fibres are ideal candidates to guide light at high powers while avoiding non-linear effects and, as such, they are generating much scientific interest. A variety of fibres have been investigated, including tube lattice photonic bandgap fibres and Kagomé-latticed photonic crystal fibres. One of the major challenges in obtaining low loss hollow core fibres is related to the unavoidable perturbations induced by the coupling between the core and cladding modes which is responsible for the increase of leakage loss. Recent approach based on the insertion of additional antiresonant elements demonstrates the significance of fibre geometrical parameters and shows leakage loss of an order of ~10-4 dB/m. In this paper, we present preliminary results of a novel approach to fibres that guide light in a large hollow core, starting from the high index contrast grating reflector platform. Subwavelength gratings have been used to achieve broadband mirrors with reflectivity greater than 99%. Importantly, the physical dimensions of the grating must be smaller than the wavelength of incident light, which implies that the diffraction order of interest is 0th. Under a surface normal incidence on diffraction grating, evanescent orders in the direction parallel to the grating period overlap with the leaky mode of the grating leading to the effect of guided mode resonance and a destructive interference effect between the two grating modes, which results in high reflection.
Vukovic, N.A.
3de33ba9-eb8f-4a06-a65e-4ac0a602a157
Zervas, M.N.
1840a474-dd50-4a55-ab74-6f086aa3f701
Vukovic, N.A.
3de33ba9-eb8f-4a06-a65e-4ac0a602a157
Zervas, M.N.
1840a474-dd50-4a55-ab74-6f086aa3f701

Vukovic, N.A. and Zervas, M.N. (2014) Hollow core large mode area fibre employing a subwavelength grating reflector. EPSRC Conference: Manufacturing the Future, Glasgow. 22 - 24 Sep 2014.

Record type: Conference or Workshop Item (Paper)

Abstract

Hollow core large mode area fibres are ideal candidates to guide light at high powers while avoiding non-linear effects and, as such, they are generating much scientific interest. A variety of fibres have been investigated, including tube lattice photonic bandgap fibres and Kagomé-latticed photonic crystal fibres. One of the major challenges in obtaining low loss hollow core fibres is related to the unavoidable perturbations induced by the coupling between the core and cladding modes which is responsible for the increase of leakage loss. Recent approach based on the insertion of additional antiresonant elements demonstrates the significance of fibre geometrical parameters and shows leakage loss of an order of ~10-4 dB/m. In this paper, we present preliminary results of a novel approach to fibres that guide light in a large hollow core, starting from the high index contrast grating reflector platform. Subwavelength gratings have been used to achieve broadband mirrors with reflectivity greater than 99%. Importantly, the physical dimensions of the grating must be smaller than the wavelength of incident light, which implies that the diffraction order of interest is 0th. Under a surface normal incidence on diffraction grating, evanescent orders in the direction parallel to the grating period overlap with the leaky mode of the grating leading to the effect of guided mode resonance and a destructive interference effect between the two grating modes, which results in high reflection.

Text
6530.pdf - Other
Download (155kB)

More information

e-pub ahead of print date: September 2014
Venue - Dates: EPSRC Conference: Manufacturing the Future, Glasgow, 2014-09-22 - 2014-09-24
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 369670
URI: http://eprints.soton.ac.uk/id/eprint/369670
PURE UUID: 2c64d4e7-8a9b-4442-9074-f83338a50b0a
ORCID for M.N. Zervas: ORCID iD orcid.org/0000-0002-0651-4059

Catalogue record

Date deposited: 14 Oct 2014 10:16
Last modified: 12 Dec 2021 02:42

Export record

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.

×