The University of Southampton
University of Southampton Institutional Repository

Coupling to circularly asymmetric modes via long-period gratings made in a standard straight fiber

Coupling to circularly asymmetric modes via long-period gratings made in a standard straight fiber
Coupling to circularly asymmetric modes via long-period gratings made in a standard straight fiber

We demonstrate long-period fiber gratings made in a straight standard optical fiber via a CO2 laser side irradiation that couples light between modes of different azimuthal symmetry. We show that such coupling can be even stronger than that to the azimuthally symmetric modes, provided the photoinduced asymmetry in the refractive index change across the fiber cross-section is high enough. This suggests that some previously-observed phenomena with CO2-written LPGs not observed with other types of LPGs may be attributed to LPG resonances that couple light into the cladding modes with higher azimuthal symmetry. We show it on an example of bend-induced LPG resonance position tuning with the resonance depth maintained constant.

0030-4018
90-93
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d

Slavík, Radan (2007) Coupling to circularly asymmetric modes via long-period gratings made in a standard straight fiber. Optics Communications, 275 (1), 90-93. (doi:10.1016/j.optcom.2007.02.064).

Record type: Article

Abstract

We demonstrate long-period fiber gratings made in a straight standard optical fiber via a CO2 laser side irradiation that couples light between modes of different azimuthal symmetry. We show that such coupling can be even stronger than that to the azimuthally symmetric modes, provided the photoinduced asymmetry in the refractive index change across the fiber cross-section is high enough. This suggests that some previously-observed phenomena with CO2-written LPGs not observed with other types of LPGs may be attributed to LPG resonances that couple light into the cladding modes with higher azimuthal symmetry. We show it on an example of bend-induced LPG resonance position tuning with the resonance depth maintained constant.

This record has no associated files available for download.

More information

Published date: 1 July 2007
Additional Information: This work was supported by the Ministry of Education, Youth and Sports of the Czech Republic in frame of 1K 04 program.

Identifiers

Local EPrints ID: 456645
URI: http://eprints.soton.ac.uk/id/eprint/456645
ISSN: 0030-4018
PURE UUID: 53172c8e-7989-4104-9ab2-72460cc71512
ORCID for Radan Slavík: ORCID iD orcid.org/0000-0002-9336-4262

Catalogue record

Date deposited: 05 May 2022 17:00
Last modified: 06 May 2022 01:41

Export record

Altmetrics

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.

×