Design of a Broadband Polarization Splitter Based on Anisotropy-Engineered Tilted Subwavelength Gratings
Polarization management is of paramount importance in integrated optics, particularly for highly birefringent photonic platforms such as silicon-on-insulator. In this paper, we present a polarization beam splitter based on a multimode interference coupler incorporating tilted subwavelength gratings....
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| Format: | Article |
| Language: | English |
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IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8693962/ |
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| author | Alaine Herrero-Bermello Jose Manuel Luque-Gonzalez Aitor V. Velasco Alejandro Ortega-Monux Pavel Cheben Robert Halir |
| author_facet | Alaine Herrero-Bermello Jose Manuel Luque-Gonzalez Aitor V. Velasco Alejandro Ortega-Monux Pavel Cheben Robert Halir |
| author_sort | Alaine Herrero-Bermello |
| collection | DOAJ |
| description | Polarization management is of paramount importance in integrated optics, particularly for highly birefringent photonic platforms such as silicon-on-insulator. In this paper, we present a polarization beam splitter based on a multimode interference coupler incorporating tilted subwavelength gratings. The tilt provides accurate control of the structural anisotropy and enables independent selection of the beat length for two orthogonal polarization states. As a result, device length is reduced to less than 100 <inline-formula><tex-math notation="LaTeX">$\mu$</tex-math></inline-formula>m while simultaneously achieving broadband operation through subwavelength grating dispersion engineering. Insertion losses below 1 dB and an extinction ratio higher than 20 dB are demonstrated through three-dimensional FDTD simulation in a 131-nm bandwidth. |
| format | Article |
| id | doaj-art-5be5e759bd1c41fea1a20264b17eeef2 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-5be5e759bd1c41fea1a20264b17eeef22025-08-20T03:32:32ZengIEEEIEEE Photonics Journal1943-06552019-01-011131810.1109/JPHOT.2019.29123358693962Design of a Broadband Polarization Splitter Based on Anisotropy-Engineered Tilted Subwavelength GratingsAlaine Herrero-Bermello0https://orcid.org/0000-0001-7842-5007Jose Manuel Luque-Gonzalez1https://orcid.org/0000-0002-6838-8641Aitor V. Velasco2https://orcid.org/0000-0001-7729-8595Alejandro Ortega-Monux3https://orcid.org/0000-0001-8313-6381Pavel Cheben4Robert Halir5https://orcid.org/0000-0002-5560-3189Consejo Superior de Investigaciones Científicas, Instituto de Óptica, Madrid, EspañaDepartamento de Ingeniería de Comunicaciones, ETSI Telecomunicación, Campus de Teatinos s/n, Universidad de Málaga, Málaga, EspañaConsejo Superior de Investigaciones Científicas, Instituto de Óptica, Madrid, EspañaDepartamento de Ingeniería de Comunicaciones, ETSI Telecomunicación, Campus de Teatinos s/n, Universidad de Málaga, Málaga, EspañaNational Research Council of Canada, Ottawa, ON, CanadaDepartamento de Ingeniería de Comunicaciones, ETSI Telecomunicación, Campus de Teatinos s/n, Universidad de Málaga, Málaga, EspañaPolarization management is of paramount importance in integrated optics, particularly for highly birefringent photonic platforms such as silicon-on-insulator. In this paper, we present a polarization beam splitter based on a multimode interference coupler incorporating tilted subwavelength gratings. The tilt provides accurate control of the structural anisotropy and enables independent selection of the beat length for two orthogonal polarization states. As a result, device length is reduced to less than 100 <inline-formula><tex-math notation="LaTeX">$\mu$</tex-math></inline-formula>m while simultaneously achieving broadband operation through subwavelength grating dispersion engineering. Insertion losses below 1 dB and an extinction ratio higher than 20 dB are demonstrated through three-dimensional FDTD simulation in a 131-nm bandwidth.https://ieeexplore.ieee.org/document/8693962/Polarization beam splitter (PBS)multimode interference coupler (MMI)sub-wavelength grating (SWG)anisotropy engineeringsilicon-on-insulator (SOI) |
| spellingShingle | Alaine Herrero-Bermello Jose Manuel Luque-Gonzalez Aitor V. Velasco Alejandro Ortega-Monux Pavel Cheben Robert Halir Design of a Broadband Polarization Splitter Based on Anisotropy-Engineered Tilted Subwavelength Gratings IEEE Photonics Journal Polarization beam splitter (PBS) multimode interference coupler (MMI) sub-wavelength grating (SWG) anisotropy engineering silicon-on-insulator (SOI) |
| title | Design of a Broadband Polarization Splitter Based on Anisotropy-Engineered Tilted Subwavelength Gratings |
| title_full | Design of a Broadband Polarization Splitter Based on Anisotropy-Engineered Tilted Subwavelength Gratings |
| title_fullStr | Design of a Broadband Polarization Splitter Based on Anisotropy-Engineered Tilted Subwavelength Gratings |
| title_full_unstemmed | Design of a Broadband Polarization Splitter Based on Anisotropy-Engineered Tilted Subwavelength Gratings |
| title_short | Design of a Broadband Polarization Splitter Based on Anisotropy-Engineered Tilted Subwavelength Gratings |
| title_sort | design of a broadband polarization splitter based on anisotropy engineered tilted subwavelength gratings |
| topic | Polarization beam splitter (PBS) multimode interference coupler (MMI) sub-wavelength grating (SWG) anisotropy engineering silicon-on-insulator (SOI) |
| url | https://ieeexplore.ieee.org/document/8693962/ |
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