Inverse Designed Grating Coupler With Low Loss and High Bandwidth on LNOI Platform
A grating coupler structure on a X-cut lithium niobate on insulator (LNOI) platform is designed and demonstrated. The utilized inverse design method is based on gradient-based adjoint optimization method, which is time saving and with more optimization degrees of freedom. For TE polarization, the hi...
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| Format: | Article |
| Language: | English |
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IEEE
2024-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/10384693/ |
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| author | Xingsheng He Dongyue Sun Jingye Chen Yaocheng Shi |
| author_facet | Xingsheng He Dongyue Sun Jingye Chen Yaocheng Shi |
| author_sort | Xingsheng He |
| collection | DOAJ |
| description | A grating coupler structure on a X-cut lithium niobate on insulator (LNOI) platform is designed and demonstrated. The utilized inverse design method is based on gradient-based adjoint optimization method, which is time saving and with more optimization degrees of freedom. For TE polarization, the high coupling efficiency of −3.3 dB is experimentally obtained. The maximum coupling efficiency is still −3.9 dB with the broadband 3-dB bandwidth of 90 nm. The grating coupler of high performance is realized by only single step etching and without bottom metal reflection layer. |
| format | Article |
| id | doaj-art-83efe07e5b9b450f942c8e9819fdbd46 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-83efe07e5b9b450f942c8e9819fdbd462025-08-20T03:33:14ZengIEEEIEEE Photonics Journal1943-06552024-01-011611510.1109/JPHOT.2024.335119910384693Inverse Designed Grating Coupler With Low Loss and High Bandwidth on LNOI PlatformXingsheng He0https://orcid.org/0009-0007-7964-4720Dongyue Sun1https://orcid.org/0009-0003-6686-1700Jingye Chen2https://orcid.org/0000-0003-3994-8934Yaocheng Shi3https://orcid.org/0000-0003-4489-8310State Key Laboratory for Modern Optical Instrumentation, Center for Optical and Electromagnetic Research, Ningbo Innovation Center, College of Optical Science and Engineering, Zhejiang University, Zhejiang, ChinaState Key Laboratory for Modern Optical Instrumentation, Center for Optical and Electromagnetic Research, Ningbo Innovation Center, College of Optical Science and Engineering, Zhejiang University, Zhejiang, ChinaState Key Laboratory for Modern Optical Instrumentation, Center for Optical and Electromagnetic Research, Ningbo Innovation Center, College of Optical Science and Engineering, Zhejiang University, Zhejiang, ChinaState Key Laboratory for Modern Optical Instrumentation, Center for Optical and Electromagnetic Research, Ningbo Innovation Center, College of Optical Science and Engineering, Zhejiang University, Zhejiang, ChinaA grating coupler structure on a X-cut lithium niobate on insulator (LNOI) platform is designed and demonstrated. The utilized inverse design method is based on gradient-based adjoint optimization method, which is time saving and with more optimization degrees of freedom. For TE polarization, the high coupling efficiency of −3.3 dB is experimentally obtained. The maximum coupling efficiency is still −3.9 dB with the broadband 3-dB bandwidth of 90 nm. The grating coupler of high performance is realized by only single step etching and without bottom metal reflection layer.https://ieeexplore.ieee.org/document/10384693/Grating couplerlithium niobateinverse design |
| spellingShingle | Xingsheng He Dongyue Sun Jingye Chen Yaocheng Shi Inverse Designed Grating Coupler With Low Loss and High Bandwidth on LNOI Platform IEEE Photonics Journal Grating coupler lithium niobate inverse design |
| title | Inverse Designed Grating Coupler With Low Loss and High Bandwidth on LNOI Platform |
| title_full | Inverse Designed Grating Coupler With Low Loss and High Bandwidth on LNOI Platform |
| title_fullStr | Inverse Designed Grating Coupler With Low Loss and High Bandwidth on LNOI Platform |
| title_full_unstemmed | Inverse Designed Grating Coupler With Low Loss and High Bandwidth on LNOI Platform |
| title_short | Inverse Designed Grating Coupler With Low Loss and High Bandwidth on LNOI Platform |
| title_sort | inverse designed grating coupler with low loss and high bandwidth on lnoi platform |
| topic | Grating coupler lithium niobate inverse design |
| url | https://ieeexplore.ieee.org/document/10384693/ |
| work_keys_str_mv | AT xingshenghe inversedesignedgratingcouplerwithlowlossandhighbandwidthonlnoiplatform AT dongyuesun inversedesignedgratingcouplerwithlowlossandhighbandwidthonlnoiplatform AT jingyechen inversedesignedgratingcouplerwithlowlossandhighbandwidthonlnoiplatform AT yaochengshi inversedesignedgratingcouplerwithlowlossandhighbandwidthonlnoiplatform |