Polarization-Splitting Grating Coupler on Lithium Niobate Thin Film
In this study, one-dimensional grating coupler on single-crystal lithium niobate thin film (lithium niobate on insulator, LNOI) that also served as a polarization splitter was designed. The coupler could separate both orthogonal polarization states into two opposite directions while coupled light fr...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/14/3/226 |
| _version_ | 1827306604867878912 |
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| author | Zhihua Chen Longxi Chen Xiangjia Meng Yufu Ning Yang Xun |
| author_facet | Zhihua Chen Longxi Chen Xiangjia Meng Yufu Ning Yang Xun |
| author_sort | Zhihua Chen |
| collection | DOAJ |
| description | In this study, one-dimensional grating coupler on single-crystal lithium niobate thin film (lithium niobate on insulator, LNOI) that also served as a polarization splitter was designed. The coupler could separate both orthogonal polarization states into two opposite directions while coupled light from a standard single-mode fiber to a waveguide on LNOI at the same time. Using segmented and apodized designing, the peak coupling efficiencies (CEs) around telecommunication wavelength 1550 nm for fundamental TE and TM modes of −2.82 dB and −2.83 dB, respectively, were achieved. The CEs could be optimized to −1.97 dB and −1.8 dB when a metal layer was added below the silicon dioxide layer. |
| first_indexed | 2024-04-24T18:24:14Z |
| format | Article |
| id | doaj.art-1f755457a4c44200b90f473f93f451bd |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-04-24T18:24:14Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-1f755457a4c44200b90f473f93f451bd2024-03-27T13:32:25ZengMDPI AGCrystals2073-43522024-02-0114322610.3390/cryst14030226Polarization-Splitting Grating Coupler on Lithium Niobate Thin FilmZhihua Chen0Longxi Chen1Xiangjia Meng2Yufu Ning3Yang Xun4School of Information Engineering, Shandong Youth University of Political Science, Jinan 250103, ChinaSchool of Information Engineering, Shandong Youth University of Political Science, Jinan 250103, ChinaSchool of Information Engineering, Shandong Youth University of Political Science, Jinan 250103, ChinaSchool of Information Engineering, Shandong Youth University of Political Science, Jinan 250103, ChinaSchool of Information Engineering, Shandong Youth University of Political Science, Jinan 250103, ChinaIn this study, one-dimensional grating coupler on single-crystal lithium niobate thin film (lithium niobate on insulator, LNOI) that also served as a polarization splitter was designed. The coupler could separate both orthogonal polarization states into two opposite directions while coupled light from a standard single-mode fiber to a waveguide on LNOI at the same time. Using segmented and apodized designing, the peak coupling efficiencies (CEs) around telecommunication wavelength 1550 nm for fundamental TE and TM modes of −2.82 dB and −2.83 dB, respectively, were achieved. The CEs could be optimized to −1.97 dB and −1.8 dB when a metal layer was added below the silicon dioxide layer.https://www.mdpi.com/2073-4352/14/3/226polarization splittergrating couplerlithium niobateLNOI |
| spellingShingle | Zhihua Chen Longxi Chen Xiangjia Meng Yufu Ning Yang Xun Polarization-Splitting Grating Coupler on Lithium Niobate Thin Film Crystals polarization splitter grating coupler lithium niobate LNOI |
| title | Polarization-Splitting Grating Coupler on Lithium Niobate Thin Film |
| title_full | Polarization-Splitting Grating Coupler on Lithium Niobate Thin Film |
| title_fullStr | Polarization-Splitting Grating Coupler on Lithium Niobate Thin Film |
| title_full_unstemmed | Polarization-Splitting Grating Coupler on Lithium Niobate Thin Film |
| title_short | Polarization-Splitting Grating Coupler on Lithium Niobate Thin Film |
| title_sort | polarization splitting grating coupler on lithium niobate thin film |
| topic | polarization splitter grating coupler lithium niobate LNOI |
| url | https://www.mdpi.com/2073-4352/14/3/226 |
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