The Design and Characterization of an Ultra-Compact Asymmetrical Multimode Interference Splitter on Lithium Niobate Thin Film
We propose and demonstrate a high-performance asymmetrical multimode interference splitter on X-cut lithium niobate on insulator (LNOI) with an ultra-compact size of 5.8 μm × (26.4–35.6) μm. A rectangle with a small region is removed from the upper left corner of the multimode interference (MMI) cou...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/11/1/60 |
| _version_ | 1827371304973500416 |
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| author | Dechen Li Jinye Li Run Li Jianguo Liu |
| author_facet | Dechen Li Jinye Li Run Li Jianguo Liu |
| author_sort | Dechen Li |
| collection | DOAJ |
| description | We propose and demonstrate a high-performance asymmetrical multimode interference splitter on X-cut lithium niobate on insulator (LNOI) with an ultra-compact size of 5.8 μm × (26.4–35.6) μm. A rectangle with a small region is removed from the upper left corner of the multimode interference (MMI) coupler to achieve a variable splitting ratio. Here, we design and characterize MMIs in six different distribution ratios ranging from 50:50 to 95:5 on a 600 nm thick LNOI. Based on the cascade structure, the linear fitting method accurately shows the device loss (~0.1–0.9 dB). Our fabricated devices demonstrate robustness across a 30 nm optical bandwidth (1535–1565 nm). In addition, we numerically simulate the Z-cut LNOI, showing that the structure corresponding to the TM mode can also achieve a good variable splitting ratio. |
| first_indexed | 2024-03-08T10:37:24Z |
| format | Article |
| id | doaj.art-5bf8364e91464d97a74f841c15a7e128 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-08T10:37:24Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-5bf8364e91464d97a74f841c15a7e1282024-01-26T18:09:49ZengMDPI AGPhotonics2304-67322024-01-011116010.3390/photonics11010060The Design and Characterization of an Ultra-Compact Asymmetrical Multimode Interference Splitter on Lithium Niobate Thin FilmDechen Li0Jinye Li1Run Li2Jianguo Liu3Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaWe propose and demonstrate a high-performance asymmetrical multimode interference splitter on X-cut lithium niobate on insulator (LNOI) with an ultra-compact size of 5.8 μm × (26.4–35.6) μm. A rectangle with a small region is removed from the upper left corner of the multimode interference (MMI) coupler to achieve a variable splitting ratio. Here, we design and characterize MMIs in six different distribution ratios ranging from 50:50 to 95:5 on a 600 nm thick LNOI. Based on the cascade structure, the linear fitting method accurately shows the device loss (~0.1–0.9 dB). Our fabricated devices demonstrate robustness across a 30 nm optical bandwidth (1535–1565 nm). In addition, we numerically simulate the Z-cut LNOI, showing that the structure corresponding to the TM mode can also achieve a good variable splitting ratio.https://www.mdpi.com/2304-6732/11/1/60lithium niobateultra-compactasymmetrical multimode interference splitter |
| spellingShingle | Dechen Li Jinye Li Run Li Jianguo Liu The Design and Characterization of an Ultra-Compact Asymmetrical Multimode Interference Splitter on Lithium Niobate Thin Film Photonics lithium niobate ultra-compact asymmetrical multimode interference splitter |
| title | The Design and Characterization of an Ultra-Compact Asymmetrical Multimode Interference Splitter on Lithium Niobate Thin Film |
| title_full | The Design and Characterization of an Ultra-Compact Asymmetrical Multimode Interference Splitter on Lithium Niobate Thin Film |
| title_fullStr | The Design and Characterization of an Ultra-Compact Asymmetrical Multimode Interference Splitter on Lithium Niobate Thin Film |
| title_full_unstemmed | The Design and Characterization of an Ultra-Compact Asymmetrical Multimode Interference Splitter on Lithium Niobate Thin Film |
| title_short | The Design and Characterization of an Ultra-Compact Asymmetrical Multimode Interference Splitter on Lithium Niobate Thin Film |
| title_sort | design and characterization of an ultra compact asymmetrical multimode interference splitter on lithium niobate thin film |
| topic | lithium niobate ultra-compact asymmetrical multimode interference splitter |
| url | https://www.mdpi.com/2304-6732/11/1/60 |
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