Efficient TE-Polarized Mode-Order Converter Based on High-Index-Contrast Polygonal Slot in a Silicon-on-Insulator Waveguide
We proposed a new type of transverse electric (TE) polarized mode-order converter based on a deeply-etched polygonal slot on a silicon-on-insulator waveguide. Along the transverse direction of the waveguide, two irregular boundary surfaces of the slot can introduce high-contrast index modulation on...
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2019-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8674595/ |
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| author | Lijun Hao Rulei Xiao Yuechun Shi Pan Dai Yong Zhao Shengping Liu Jun Lu Xiangfei Chen |
| author_facet | Lijun Hao Rulei Xiao Yuechun Shi Pan Dai Yong Zhao Shengping Liu Jun Lu Xiangfei Chen |
| author_sort | Lijun Hao |
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| description | We proposed a new type of transverse electric (TE) polarized mode-order converter based on a deeply-etched polygonal slot on a silicon-on-insulator waveguide. Along the transverse direction of the waveguide, two irregular boundary surfaces of the slot can introduce high-contrast index modulation on guided modes, leading to multimode interference in the slot. Therefore, when the slot is optimized, we can achieve efficient mode conversions based on the multimode interference. As examples, mode converters from the fundamental TE mode (TE<sub>0</sub>) to the first-order TE mode (TE<sub>1</sub>) and to the second-order TE mode (TE<sub>2</sub>) have both been demonstrated with a short device length (<24.0 <italic>μ</italic>m), a high mode conversion efficiency (>97.6%), and a low modal crosstalk (< −20.0 dB) over a broad wavelength range from 1500 to 1600 nm (∼100 nm). In addition, based on different polygonal slots, other types of mode conversions such as from TE<sub>1</sub> to TE<sub>3</sub> and from TE<sub>2</sub> to TE<sub>1</sub> have be realized. Fabrication tolerance of the proposed structure is analyzed. Owing to the high efficiency and compact size, the proposed structure could be applied to on-chip mode division multiplexing systems for high-density integration. |
| format | Article |
| id | doaj-art-8eb8569918214ebe9a3f1440df891aa6 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-8eb8569918214ebe9a3f1440df891aa62025-08-20T03:33:11ZengIEEEIEEE Photonics Journal1943-06552019-01-0111211010.1109/JPHOT.2019.29076408674595Efficient TE-Polarized Mode-Order Converter Based on High-Index-Contrast Polygonal Slot in a Silicon-on-Insulator WaveguideLijun Hao0https://orcid.org/0000-0003-2256-9268Rulei Xiao1https://orcid.org/0000-0003-0048-7616Yuechun Shi2https://orcid.org/0000-0002-9834-3460Pan Dai3Yong Zhao4Shengping Liu5https://orcid.org/0000-0001-6044-1885Jun Lu6Xiangfei Chen7https://orcid.org/0000-0001-5826-5472Key Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education, and National Laboratory of Solid State Microstructures, and College of Engineering and Applied Sciences & Institute of Optical Communication Engineering, Nanjing University, Nanjing, Jiangsu ChinaKey Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education, and National Laboratory of Solid State Microstructures, and College of Engineering and Applied Sciences & Institute of Optical Communication Engineering, Nanjing University, Nanjing, Jiangsu ChinaKey Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education, and National Laboratory of Solid State Microstructures, and College of Engineering and Applied Sciences & Institute of Optical Communication Engineering, Nanjing University, Nanjing, Jiangsu ChinaKey Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education, and National Laboratory of Solid State Microstructures, and College of Engineering and Applied Sciences & Institute of Optical Communication Engineering, Nanjing University, Nanjing, Jiangsu ChinaKey Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education, and National Laboratory of Solid State Microstructures, and College of Engineering and Applied Sciences & Institute of Optical Communication Engineering, Nanjing University, Nanjing, Jiangsu ChinaKey Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education, and National Laboratory of Solid State Microstructures, and College of Engineering and Applied Sciences & Institute of Optical Communication Engineering, Nanjing University, Nanjing, Jiangsu ChinaKey Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education, and National Laboratory of Solid State Microstructures, and College of Engineering and Applied Sciences & Institute of Optical Communication Engineering, Nanjing University, Nanjing, Jiangsu ChinaKey Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education, and National Laboratory of Solid State Microstructures, and College of Engineering and Applied Sciences & Institute of Optical Communication Engineering, Nanjing University, Nanjing, Jiangsu ChinaWe proposed a new type of transverse electric (TE) polarized mode-order converter based on a deeply-etched polygonal slot on a silicon-on-insulator waveguide. Along the transverse direction of the waveguide, two irregular boundary surfaces of the slot can introduce high-contrast index modulation on guided modes, leading to multimode interference in the slot. Therefore, when the slot is optimized, we can achieve efficient mode conversions based on the multimode interference. As examples, mode converters from the fundamental TE mode (TE<sub>0</sub>) to the first-order TE mode (TE<sub>1</sub>) and to the second-order TE mode (TE<sub>2</sub>) have both been demonstrated with a short device length (<24.0 <italic>μ</italic>m), a high mode conversion efficiency (>97.6%), and a low modal crosstalk (< −20.0 dB) over a broad wavelength range from 1500 to 1600 nm (∼100 nm). In addition, based on different polygonal slots, other types of mode conversions such as from TE<sub>1</sub> to TE<sub>3</sub> and from TE<sub>2</sub> to TE<sub>1</sub> have be realized. Fabrication tolerance of the proposed structure is analyzed. Owing to the high efficiency and compact size, the proposed structure could be applied to on-chip mode division multiplexing systems for high-density integration.https://ieeexplore.ieee.org/document/8674595/Integrated optics devicesmode conversionsilicon photonics. |
| spellingShingle | Lijun Hao Rulei Xiao Yuechun Shi Pan Dai Yong Zhao Shengping Liu Jun Lu Xiangfei Chen Efficient TE-Polarized Mode-Order Converter Based on High-Index-Contrast Polygonal Slot in a Silicon-on-Insulator Waveguide IEEE Photonics Journal Integrated optics devices mode conversion silicon photonics. |
| title | Efficient TE-Polarized Mode-Order Converter Based on High-Index-Contrast Polygonal Slot in a Silicon-on-Insulator Waveguide |
| title_full | Efficient TE-Polarized Mode-Order Converter Based on High-Index-Contrast Polygonal Slot in a Silicon-on-Insulator Waveguide |
| title_fullStr | Efficient TE-Polarized Mode-Order Converter Based on High-Index-Contrast Polygonal Slot in a Silicon-on-Insulator Waveguide |
| title_full_unstemmed | Efficient TE-Polarized Mode-Order Converter Based on High-Index-Contrast Polygonal Slot in a Silicon-on-Insulator Waveguide |
| title_short | Efficient TE-Polarized Mode-Order Converter Based on High-Index-Contrast Polygonal Slot in a Silicon-on-Insulator Waveguide |
| title_sort | efficient te polarized mode order converter based on high index contrast polygonal slot in a silicon on insulator waveguide |
| topic | Integrated optics devices mode conversion silicon photonics. |
| url | https://ieeexplore.ieee.org/document/8674595/ |
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