Subwavelength structures for taper waveguides

Detalhes bibliográficos
Autor(a) principal: Lourenço, Paulo
Data de Publicação: 2022
Outros Autores: Fantoni, Alessandro, Costa, João, Fernandes, Miguel, Vieira, Manuela
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.21/15747
Resumo: In Photonic Integrated Circuits (PICs) it is often necessary some sort of mismatch adaptation between waveguides of different cross-sections. There are several instances of such a designing constraint, being the vertical coupling between the PIC and an optical fibre probably the most representative of all examples. Here, the beam of electromagnetic energy inside the PIC must be inserted/extracted through/to an optical fibre. Typical core diameters are approximately 10 µm and 5 µm, for single mode optical fibres operating in the near infrared and visible wavelengths, respectively. On the other hand, the optical interconnects linking individual structures in PICs are usually single mode waveguides, 400 to 500 nm wide and a few hundreds of nanometres thick. This presents a bidimensional mismatch between the optical fibre and the single mode waveguide within the PIC, that requires both lateral and longitudinal beam expansions. In this work, we have approached the lateral expansion of the fundamental mode propagating in a single mode waveguide, at the operating wavelength of 1550 nm and being coupled out into an optical fibre, through a grating structure 14.27 µm wide. To this end, we have designed and simulated a subwavelength metamaterial planar structure, which is able to expand laterally the fundamental mode’s profile from 450 nm to 14.27 µm, within 11.1 µm. Furthermore, we will be presenting the results obtained when comparing this structure with several linear inverted taper waveguides, regarding coupling and propagation efficiencies. Namely, we compared the coupling efficiencies of the modes propagating in an 100 µm long waveguide, when being excited by the analytically calculated fundamental mode and the fields obtained at the end of the designed structure. The results obtained for the designed structure 11.1 µm long and the calculated fundamental mode showed a coupling efficiency of -1.53 dB and -1.20 dB, respectively.
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spelling Subwavelength structures for taper waveguidesPhotonic integratedOptical fibreWaveguidesIn Photonic Integrated Circuits (PICs) it is often necessary some sort of mismatch adaptation between waveguides of different cross-sections. There are several instances of such a designing constraint, being the vertical coupling between the PIC and an optical fibre probably the most representative of all examples. Here, the beam of electromagnetic energy inside the PIC must be inserted/extracted through/to an optical fibre. Typical core diameters are approximately 10 µm and 5 µm, for single mode optical fibres operating in the near infrared and visible wavelengths, respectively. On the other hand, the optical interconnects linking individual structures in PICs are usually single mode waveguides, 400 to 500 nm wide and a few hundreds of nanometres thick. This presents a bidimensional mismatch between the optical fibre and the single mode waveguide within the PIC, that requires both lateral and longitudinal beam expansions. In this work, we have approached the lateral expansion of the fundamental mode propagating in a single mode waveguide, at the operating wavelength of 1550 nm and being coupled out into an optical fibre, through a grating structure 14.27 µm wide. To this end, we have designed and simulated a subwavelength metamaterial planar structure, which is able to expand laterally the fundamental mode’s profile from 450 nm to 14.27 µm, within 11.1 µm. Furthermore, we will be presenting the results obtained when comparing this structure with several linear inverted taper waveguides, regarding coupling and propagation efficiencies. Namely, we compared the coupling efficiencies of the modes propagating in an 100 µm long waveguide, when being excited by the analytically calculated fundamental mode and the fields obtained at the end of the designed structure. The results obtained for the designed structure 11.1 µm long and the calculated fundamental mode showed a coupling efficiency of -1.53 dB and -1.20 dB, respectively.IOPScienceRCIPLLourenço, PauloFantoni, AlessandroCosta, JoãoFernandes, MiguelVieira, Manuela2023-03-02T14:48:16Z2022-072022-07-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/15747engLOURENÇO, Paulo; [et al] – Subwavelength structures for taper waveguides. In Journal of Physics: Conference Series 2407 (Fifth International Conference on Applications of Optics and Photonics – A AOP2022). Guimarães, Portugal: IOPScience, 2022. ISSN 1742-6596. Vol. 2407. Pp. 1-8.1742-659610.1088/1742-6596/2407/1/012040info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-03T10:13:38Zoai:repositorio.ipl.pt:10400.21/15747Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:23:21.986245Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Subwavelength structures for taper waveguides
title Subwavelength structures for taper waveguides
spellingShingle Subwavelength structures for taper waveguides
Lourenço, Paulo
Photonic integrated
Optical fibre
Waveguides
title_short Subwavelength structures for taper waveguides
title_full Subwavelength structures for taper waveguides
title_fullStr Subwavelength structures for taper waveguides
title_full_unstemmed Subwavelength structures for taper waveguides
title_sort Subwavelength structures for taper waveguides
author Lourenço, Paulo
author_facet Lourenço, Paulo
Fantoni, Alessandro
Costa, João
Fernandes, Miguel
Vieira, Manuela
author_role author
author2 Fantoni, Alessandro
Costa, João
Fernandes, Miguel
Vieira, Manuela
author2_role author
author
author
author
dc.contributor.none.fl_str_mv RCIPL
dc.contributor.author.fl_str_mv Lourenço, Paulo
Fantoni, Alessandro
Costa, João
Fernandes, Miguel
Vieira, Manuela
dc.subject.por.fl_str_mv Photonic integrated
Optical fibre
Waveguides
topic Photonic integrated
Optical fibre
Waveguides
description In Photonic Integrated Circuits (PICs) it is often necessary some sort of mismatch adaptation between waveguides of different cross-sections. There are several instances of such a designing constraint, being the vertical coupling between the PIC and an optical fibre probably the most representative of all examples. Here, the beam of electromagnetic energy inside the PIC must be inserted/extracted through/to an optical fibre. Typical core diameters are approximately 10 µm and 5 µm, for single mode optical fibres operating in the near infrared and visible wavelengths, respectively. On the other hand, the optical interconnects linking individual structures in PICs are usually single mode waveguides, 400 to 500 nm wide and a few hundreds of nanometres thick. This presents a bidimensional mismatch between the optical fibre and the single mode waveguide within the PIC, that requires both lateral and longitudinal beam expansions. In this work, we have approached the lateral expansion of the fundamental mode propagating in a single mode waveguide, at the operating wavelength of 1550 nm and being coupled out into an optical fibre, through a grating structure 14.27 µm wide. To this end, we have designed and simulated a subwavelength metamaterial planar structure, which is able to expand laterally the fundamental mode’s profile from 450 nm to 14.27 µm, within 11.1 µm. Furthermore, we will be presenting the results obtained when comparing this structure with several linear inverted taper waveguides, regarding coupling and propagation efficiencies. Namely, we compared the coupling efficiencies of the modes propagating in an 100 µm long waveguide, when being excited by the analytically calculated fundamental mode and the fields obtained at the end of the designed structure. The results obtained for the designed structure 11.1 µm long and the calculated fundamental mode showed a coupling efficiency of -1.53 dB and -1.20 dB, respectively.
publishDate 2022
dc.date.none.fl_str_mv 2022-07
2022-07-01T00:00:00Z
2023-03-02T14:48:16Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.21/15747
url http://hdl.handle.net/10400.21/15747
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv LOURENÇO, Paulo; [et al] – Subwavelength structures for taper waveguides. In Journal of Physics: Conference Series 2407 (Fifth International Conference on Applications of Optics and Photonics – A AOP2022). Guimarães, Portugal: IOPScience, 2022. ISSN 1742-6596. Vol. 2407. Pp. 1-8.
1742-6596
10.1088/1742-6596/2407/1/012040
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv IOPScience
publisher.none.fl_str_mv IOPScience
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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