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Numerical investigation on W-type index chalcogenide fiber based MIR supercontinuum generation

Karin Ennser, Ruben Sevilla, Mustafa A. Khamis

Proceedings of the SPIE, Volume: 10681, Start page: 31

Swansea University Author: Karin Ennser

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DOI (Published version): 10.1117/12.2306333

Abstract

This work presents a numerical study of a W-type index chalcogenide fiber design for Mid-Infrared (MIR) supercontinuum (SC) generation beyond 10μm. Our fiber design consists of a Ge15Sb15Se70 glass core, a Ge20Se80 glass inner cladding and a Ge20Sb5Se75 glass outer cladding. These chalcogenide mater...

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Published in: Proceedings of the SPIE
ISBN: 9781510618886 9781510618893
ISSN: 0277-786X 1996-756X
Published: Strasbourg, France SPIE Photonics Europe 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa43546
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spelling 2018-10-09T15:33:45.4219490 v2 43546 2018-08-23 Numerical investigation on W-type index chalcogenide fiber based MIR supercontinuum generation 0aa21e9e51bfb74793881e5780d29ae8 Karin Ennser Karin Ennser true false 2018-08-23 ACEM This work presents a numerical study of a W-type index chalcogenide fiber design for Mid-Infrared (MIR) supercontinuum (SC) generation beyond 10μm. Our fiber design consists of a Ge15Sb15Se70 glass core, a Ge20Se80 glass inner cladding and a Ge20Sb5Se75 glass outer cladding. These chalcogenide materials have the advantages to broaden the spectrum to 12μm, due to their low material absorption. The optical mode distribution of the chalcogenide fiber is simulated by a finite element method based on edge elements. With a 6 μm core diameter and a 12 μm inner cladding diameter, the proposed fiber design exhibits flat anomalous dispersion in the wavelength range (4.3-6.5μm), with a peak of about 7ps/(nm.km). The position of the second zero-dispersion wavelength (ZDW) can be easily and precisely controlled by the inner cladding size and should be shifted to around 7μm for a 18 μm inner cladding diameter. This design is more suitable for a pump wavelength at 6.3μm which is in the anomalous dispersion regime between two ZDWs and can broaden the spectrum due to the soliton dynamics. Our fiber design modelling shows that the nonlinear parameter at 6.3μm is 0.1225W−1 m−1, when using a nonlinear refractive index nNL=3.44 ×10−18 m2W−1, and the chromatic dispersion is D = 3.24ps/(nm.km). Compared to previously reported step-index fibers, the proposed W-type index chalcogenide structure ensures single mode propagation, which improves the nonlinearity, flattened dispersion profile and reduces the losses, due to a tight confinement of the mode within the core. Conference Paper/Proceeding/Abstract Proceedings of the SPIE 10681 31 SPIE Photonics Europe Strasbourg, France 9781510618886 9781510618893 0277-786X 1996-756X 20 7 2018 2018-07-20 10.1117/12.2306333 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University 2018-10-09T15:33:45.4219490 2018-08-23T09:45:05.8214565 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering Karin Ennser 1 Ruben Sevilla 2 Mustafa A. Khamis 3 0043546-23082018095158.pdf khamis2018(4).pdf 2018-08-23T09:51:58.0270000 Output 636871 application/pdf Accepted Manuscript true 2018-08-23T00:00:00.0000000 true eng
title Numerical investigation on W-type index chalcogenide fiber based MIR supercontinuum generation
spellingShingle Numerical investigation on W-type index chalcogenide fiber based MIR supercontinuum generation
Karin Ennser
title_short Numerical investigation on W-type index chalcogenide fiber based MIR supercontinuum generation
title_full Numerical investigation on W-type index chalcogenide fiber based MIR supercontinuum generation
title_fullStr Numerical investigation on W-type index chalcogenide fiber based MIR supercontinuum generation
title_full_unstemmed Numerical investigation on W-type index chalcogenide fiber based MIR supercontinuum generation
title_sort Numerical investigation on W-type index chalcogenide fiber based MIR supercontinuum generation
author_id_str_mv 0aa21e9e51bfb74793881e5780d29ae8
author_id_fullname_str_mv 0aa21e9e51bfb74793881e5780d29ae8_***_Karin Ennser
author Karin Ennser
author2 Karin Ennser
Ruben Sevilla
Mustafa A. Khamis
format Conference Paper/Proceeding/Abstract
container_title Proceedings of the SPIE
container_volume 10681
container_start_page 31
publishDate 2018
institution Swansea University
isbn 9781510618886
9781510618893
issn 0277-786X
1996-756X
doi_str_mv 10.1117/12.2306333
publisher SPIE Photonics Europe
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering
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description This work presents a numerical study of a W-type index chalcogenide fiber design for Mid-Infrared (MIR) supercontinuum (SC) generation beyond 10μm. Our fiber design consists of a Ge15Sb15Se70 glass core, a Ge20Se80 glass inner cladding and a Ge20Sb5Se75 glass outer cladding. These chalcogenide materials have the advantages to broaden the spectrum to 12μm, due to their low material absorption. The optical mode distribution of the chalcogenide fiber is simulated by a finite element method based on edge elements. With a 6 μm core diameter and a 12 μm inner cladding diameter, the proposed fiber design exhibits flat anomalous dispersion in the wavelength range (4.3-6.5μm), with a peak of about 7ps/(nm.km). The position of the second zero-dispersion wavelength (ZDW) can be easily and precisely controlled by the inner cladding size and should be shifted to around 7μm for a 18 μm inner cladding diameter. This design is more suitable for a pump wavelength at 6.3μm which is in the anomalous dispersion regime between two ZDWs and can broaden the spectrum due to the soliton dynamics. Our fiber design modelling shows that the nonlinear parameter at 6.3μm is 0.1225W−1 m−1, when using a nonlinear refractive index nNL=3.44 ×10−18 m2W−1, and the chromatic dispersion is D = 3.24ps/(nm.km). Compared to previously reported step-index fibers, the proposed W-type index chalcogenide structure ensures single mode propagation, which improves the nonlinearity, flattened dispersion profile and reduces the losses, due to a tight confinement of the mode within the core.
published_date 2018-07-20T13:38:17Z
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score 11.048064

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