High-Efficiency and Compact Polarization-Insensitive Multi-Segment Linear Silicon Nitride Edge Coupler
Edge couplers are widely utilized in photonic integrated circuits and are vital for ensuring efficient chip-to-fiber coupling. In this paper, we present a high-efficiency and compact polarization-insensitive multi-segment linear silicon nitride edge coupler for coupling to high numerical aperture fi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/10/5/510 |
| _version_ | 1827740311782162432 |
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| author | Yuhao Zhang Yi Liu Xuhua Cao Li Wang Chunyuan Mu Ming Li Ninghua Zhu Wei Chen |
| author_facet | Yuhao Zhang Yi Liu Xuhua Cao Li Wang Chunyuan Mu Ming Li Ninghua Zhu Wei Chen |
| author_sort | Yuhao Zhang |
| collection | DOAJ |
| description | Edge couplers are widely utilized in photonic integrated circuits and are vital for ensuring efficient chip-to-fiber coupling. In this paper, we present a high-efficiency and compact polarization-insensitive multi-segment linear silicon nitride edge coupler for coupling to high numerical aperture fibers. By optimizing the thickness of the up cladding and introducing air slots in the transverse direction, we have further modified the limiting effect of the mode field. This innovative edge coupler scheme boasts a compact structure and is compatible with existing mature standard processes, with a total length of only 38 μm. We numerically demonstrate that the proposed edge coupler exhibits a low coupling loss of 0.22 dB/0.31 dB for TE/TM modes at λ = 1550 nm. Furthermore, the proposed coupler displays high wavelength insensitivity within the range of 1400–1850 nm and maintains a coupling loss of less than 0.2 dB with a manufacturing deviation of ±20 nm. |
| first_indexed | 2024-03-11T03:23:11Z |
| format | Article |
| id | doaj.art-3324cda71f9b45a8af23e279640722f9 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-11T03:23:11Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-3324cda71f9b45a8af23e279640722f92023-11-18T02:53:47ZengMDPI AGPhotonics2304-67322023-04-0110551010.3390/photonics10050510High-Efficiency and Compact Polarization-Insensitive Multi-Segment Linear Silicon Nitride Edge CouplerYuhao Zhang0Yi Liu1Xuhua Cao2Li Wang3Chunyuan Mu4Ming Li5Ninghua Zhu6Wei Chen7State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaNational Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, ChinaState Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaEdge couplers are widely utilized in photonic integrated circuits and are vital for ensuring efficient chip-to-fiber coupling. In this paper, we present a high-efficiency and compact polarization-insensitive multi-segment linear silicon nitride edge coupler for coupling to high numerical aperture fibers. By optimizing the thickness of the up cladding and introducing air slots in the transverse direction, we have further modified the limiting effect of the mode field. This innovative edge coupler scheme boasts a compact structure and is compatible with existing mature standard processes, with a total length of only 38 μm. We numerically demonstrate that the proposed edge coupler exhibits a low coupling loss of 0.22 dB/0.31 dB for TE/TM modes at λ = 1550 nm. Furthermore, the proposed coupler displays high wavelength insensitivity within the range of 1400–1850 nm and maintains a coupling loss of less than 0.2 dB with a manufacturing deviation of ±20 nm.https://www.mdpi.com/2304-6732/10/5/510silicon photonicspolarization-insensitivesilicon nitrideedge coupler |
| spellingShingle | Yuhao Zhang Yi Liu Xuhua Cao Li Wang Chunyuan Mu Ming Li Ninghua Zhu Wei Chen High-Efficiency and Compact Polarization-Insensitive Multi-Segment Linear Silicon Nitride Edge Coupler Photonics silicon photonics polarization-insensitive silicon nitride edge coupler |
| title | High-Efficiency and Compact Polarization-Insensitive Multi-Segment Linear Silicon Nitride Edge Coupler |
| title_full | High-Efficiency and Compact Polarization-Insensitive Multi-Segment Linear Silicon Nitride Edge Coupler |
| title_fullStr | High-Efficiency and Compact Polarization-Insensitive Multi-Segment Linear Silicon Nitride Edge Coupler |
| title_full_unstemmed | High-Efficiency and Compact Polarization-Insensitive Multi-Segment Linear Silicon Nitride Edge Coupler |
| title_short | High-Efficiency and Compact Polarization-Insensitive Multi-Segment Linear Silicon Nitride Edge Coupler |
| title_sort | high efficiency and compact polarization insensitive multi segment linear silicon nitride edge coupler |
| topic | silicon photonics polarization-insensitive silicon nitride edge coupler |
| url | https://www.mdpi.com/2304-6732/10/5/510 |
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