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Modal content in hypocycloid Kagomé hollow core photonic crystal fibers

Modal content in hypocycloid Kagomé hollow core photonic crystal fibers
Modal content in hypocycloid Kagomé hollow core photonic crystal fibers
The modal content of 7 and 19 cell Kagomé anti resonant hollow core fibers (K-ARF) with hypocycloid core surrounds is experimentally investigated through the spectral and spatial (S2) imaging technique. It is observed that the 7 and 19 cell K-ARF reported here, support 4 and 7 LP mode groups respectively, however the observation that K-ARF support few mode groups is likely to be ubiquitous to 7 and 19 cell K-ARFs. The transmission loss of the higher order modes (HOMs) was measured via S2 and a cutback method. In the 7 cell K-ARF it is found that the LP11 and LP21 modes have approximately 3.6 and 5.7 times the loss of the fundamental mode (FM), respectively. In the 19 cell it is found that the LP11 mode has approximately 2.57 times the loss of the FM, while the LP02 mode has approximately 2.62 times the loss of the FM. Additionally, bend loss in these fibers is studied for the first time using S2 to reveal the effect of bend on modal content. Our measurements demonstrate that K-ARFs support a few mode groups and indicate that the differential loss of the HOMs is not substantially higher than that of the FM, and that bending the fiber does not induce significant inter modal coupling. A study of three different input beam coupling configurations demonstrates increased HOM excitation at output and a non-Gaussian profile of the output beam if poor mode field matching is achieved.
1094-4087
15798-15812
Bradley, Thomas
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Wheeler, Natalie
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Jasion, G.
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Gray, David
46319dbb-26c5-487b-af42-891e7b00e14f
Hayes, John
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Gouveia, Marcelo Botelho Alonso
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Sandoghchi, Seyed Reza
15499707-d3f2-42f1-90e2-cbe260462487
Chen, Yong
0bfb3083-4cd2-4463-a7a4-f48c4158b15a
Poletti, Francesco
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Richardson, David
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Petrovich, Marco
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Bradley, Thomas
d4cce4f3-bb69-4e14-baee-cd6a88e38101
Wheeler, Natalie
0fd34178-a77b-4c71-a3a6-86a1f634f1a0
Jasion, G.
16cfff1d-d178-41d1-a092-56e6239726b8
Gray, David
46319dbb-26c5-487b-af42-891e7b00e14f
Hayes, John
a6d3acd6-d7d5-4614-970e-0e8c594e48e2
Gouveia, Marcelo Botelho Alonso
8ada4013-f50e-4d66-b485-f47ddf16cef2
Sandoghchi, Seyed Reza
15499707-d3f2-42f1-90e2-cbe260462487
Chen, Yong
0bfb3083-4cd2-4463-a7a4-f48c4158b15a
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Petrovich, Marco
bfe895a0-da85-4a40-870a-2c7bfc84a4cf

Bradley, Thomas, Wheeler, Natalie, Jasion, G., Gray, David, Hayes, John, Gouveia, Marcelo Botelho Alonso, Sandoghchi, Seyed Reza, Chen, Yong, Poletti, Francesco, Richardson, David and Petrovich, Marco (2016) Modal content in hypocycloid Kagomé hollow core photonic crystal fibers. Optics Express, 24 (14), 15798-15812. (doi:10.1364/OE.24.015798).

Record type: Article

Abstract

The modal content of 7 and 19 cell Kagomé anti resonant hollow core fibers (K-ARF) with hypocycloid core surrounds is experimentally investigated through the spectral and spatial (S2) imaging technique. It is observed that the 7 and 19 cell K-ARF reported here, support 4 and 7 LP mode groups respectively, however the observation that K-ARF support few mode groups is likely to be ubiquitous to 7 and 19 cell K-ARFs. The transmission loss of the higher order modes (HOMs) was measured via S2 and a cutback method. In the 7 cell K-ARF it is found that the LP11 and LP21 modes have approximately 3.6 and 5.7 times the loss of the fundamental mode (FM), respectively. In the 19 cell it is found that the LP11 mode has approximately 2.57 times the loss of the FM, while the LP02 mode has approximately 2.62 times the loss of the FM. Additionally, bend loss in these fibers is studied for the first time using S2 to reveal the effect of bend on modal content. Our measurements demonstrate that K-ARFs support a few mode groups and indicate that the differential loss of the HOMs is not substantially higher than that of the FM, and that bending the fiber does not induce significant inter modal coupling. A study of three different input beam coupling configurations demonstrates increased HOM excitation at output and a non-Gaussian profile of the output beam if poor mode field matching is achieved.

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Submitted date: 8 April 2016
Accepted/In Press date: 24 June 2016
e-pub ahead of print date: 5 July 2016
Published date: 5 July 2016
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 391450
URI: https://eprints.soton.ac.uk/id/eprint/391450
ISSN: 1094-4087
PURE UUID: c09566b9-79cf-4f82-be52-2e2639a1eb0b
ORCID for Thomas Bradley: ORCID iD orcid.org/0000-0001-6568-5811
ORCID for Natalie Wheeler: ORCID iD orcid.org/0000-0002-1265-9510
ORCID for G. Jasion: ORCID iD orcid.org/0000-0001-5030-6479
ORCID for Seyed Reza Sandoghchi: ORCID iD orcid.org/0000-0003-2196-3167
ORCID for Yong Chen: ORCID iD orcid.org/0000-0003-0383-6113
ORCID for Francesco Poletti: ORCID iD orcid.org/0000-0002-1000-3083
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Marco Petrovich: ORCID iD orcid.org/0000-0002-3905-5901

Catalogue record

Date deposited: 07 Jul 2016 08:14
Last modified: 20 Mar 2019 01:37

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Contributors

Author: Thomas Bradley ORCID iD
Author: Natalie Wheeler ORCID iD
Author: G. Jasion ORCID iD
Author: David Gray
Author: John Hayes
Author: Yong Chen ORCID iD
Author: Marco Petrovich ORCID iD

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