Ultra-Low Loss and Ultra-Compact Polarization-Insensitive SOI Multimode Waveguide Crossing Based on an Inverse Design Method
Polarization-insensitive waveguide crossings are indispensable components of photonic integrated circuits (PICs), enabling the concurrent computing of optical signals from diverse waveguides inside the limits of a restricted spatial footprint. Leveraging mirror symmetry direct binary search, we succ...
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| Format: | Article |
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MDPI AG
2024-12-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/11/12/1137 |
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| author | Lu Wang Hongquan Zhou Hao Shi Chengqiang Zhao Chuanqi Ma Yanqing Wu Renzhong Tai |
| author_facet | Lu Wang Hongquan Zhou Hao Shi Chengqiang Zhao Chuanqi Ma Yanqing Wu Renzhong Tai |
| author_sort | Lu Wang |
| collection | DOAJ |
| description | Polarization-insensitive waveguide crossings are indispensable components of photonic integrated circuits (PICs), enabling the concurrent computing of optical signals from diverse waveguides inside the limits of a restricted spatial footprint. Leveraging mirror symmetry direct binary search, we successfully demonstrate an ultra-compact and ultra-low loss polarization-insensitive waveguide crossing that achieves insertion losses below −0.11 dB and crosstalk levels beneath −22.6 dB for transverse electric (TE) mode, as well as insertion losses below 0.05 dB and crosstalk levels beneath −24.5 dB for transverse magnetic (TM) mode across the C-band with a footprint of 3 × 4 μm<sup>2</sup>. The results confirm that this mirror symmetry optimization method yields high-efficiency devices while reducing computational time. We believe this high-efficiency polarization-insensitive waveguide crossing can have potential applications in dense PIC systems. |
| format | Article |
| id | doaj-art-e61f4663d0644b718766f321e9b8dad6 |
| institution | DOAJ |
| issn | 2304-6732 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-e61f4663d0644b718766f321e9b8dad62025-08-20T02:43:50ZengMDPI AGPhotonics2304-67322024-12-011112113710.3390/photonics11121137Ultra-Low Loss and Ultra-Compact Polarization-Insensitive SOI Multimode Waveguide Crossing Based on an Inverse Design MethodLu Wang0Hongquan Zhou1Hao Shi2Chengqiang Zhao3Chuanqi Ma4Yanqing Wu5Renzhong Tai6Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, ChinaUniversity of Chinese Academy of Sciences, Beijing 100049, ChinaSchool of Information Science and Technology, ShanghaiTech University, Shanghai 201210, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, ChinaPolarization-insensitive waveguide crossings are indispensable components of photonic integrated circuits (PICs), enabling the concurrent computing of optical signals from diverse waveguides inside the limits of a restricted spatial footprint. Leveraging mirror symmetry direct binary search, we successfully demonstrate an ultra-compact and ultra-low loss polarization-insensitive waveguide crossing that achieves insertion losses below −0.11 dB and crosstalk levels beneath −22.6 dB for transverse electric (TE) mode, as well as insertion losses below 0.05 dB and crosstalk levels beneath −24.5 dB for transverse magnetic (TM) mode across the C-band with a footprint of 3 × 4 μm<sup>2</sup>. The results confirm that this mirror symmetry optimization method yields high-efficiency devices while reducing computational time. We believe this high-efficiency polarization-insensitive waveguide crossing can have potential applications in dense PIC systems.https://www.mdpi.com/2304-6732/11/12/1137polarization-insensitive waveguide crossingsub-wavelength structureinverse design for integrated photonics |
| spellingShingle | Lu Wang Hongquan Zhou Hao Shi Chengqiang Zhao Chuanqi Ma Yanqing Wu Renzhong Tai Ultra-Low Loss and Ultra-Compact Polarization-Insensitive SOI Multimode Waveguide Crossing Based on an Inverse Design Method Photonics polarization-insensitive waveguide crossing sub-wavelength structure inverse design for integrated photonics |
| title | Ultra-Low Loss and Ultra-Compact Polarization-Insensitive SOI Multimode Waveguide Crossing Based on an Inverse Design Method |
| title_full | Ultra-Low Loss and Ultra-Compact Polarization-Insensitive SOI Multimode Waveguide Crossing Based on an Inverse Design Method |
| title_fullStr | Ultra-Low Loss and Ultra-Compact Polarization-Insensitive SOI Multimode Waveguide Crossing Based on an Inverse Design Method |
| title_full_unstemmed | Ultra-Low Loss and Ultra-Compact Polarization-Insensitive SOI Multimode Waveguide Crossing Based on an Inverse Design Method |
| title_short | Ultra-Low Loss and Ultra-Compact Polarization-Insensitive SOI Multimode Waveguide Crossing Based on an Inverse Design Method |
| title_sort | ultra low loss and ultra compact polarization insensitive soi multimode waveguide crossing based on an inverse design method |
| topic | polarization-insensitive waveguide crossing sub-wavelength structure inverse design for integrated photonics |
| url | https://www.mdpi.com/2304-6732/11/12/1137 |
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