Optical Free-Form Couplers for High-density Integrated Photonics (OFFCHIP): A Universal Optical Interface
Coupling of light between different photonic devices, for example on-chip waveguides, fibers, and free-space optical elements, is an essential function enabling integrated optical systems. Efficient optical coupling demands matching the optical mode profiles and effective indices between two devices...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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Institute of Electrical and Electronics Engineers (IEEE)
2020
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| Online Access: | https://hdl.handle.net/1721.1/128033 |
| _version_ | 1811071105310392320 |
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| author | Yu, Shaoliang Zuo, Haijie Sun, Xiaochen Liu, Jifeng Gu, Tian Hu, Juejun |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Yu, Shaoliang Zuo, Haijie Sun, Xiaochen Liu, Jifeng Gu, Tian Hu, Juejun |
| author_sort | Yu, Shaoliang |
| collection | MIT |
| description | Coupling of light between different photonic devices, for example on-chip waveguides, fibers, and free-space optical elements, is an essential function enabling integrated optical systems. Efficient optical coupling demands matching the optical mode profiles and effective indices between two devices, and often changing propagation direction of the light. To date, such coupling is pre-dominantly accomplished via direct butt coupling of two devices, or meticulously optimized diffraction gratings. In this article, we present a new coupling scheme based on microfabricated free-form optical reflectors. The free-form reflector simultaneously achieves the functions of light beam re-directing and shaping (for mode matching), and can be versatilely adapted for coupling between photonic chips, fibers, and free-space surface-incident devices. We show that this technology uniquely fulfills all key performance requirements for optical interfaces with exceptionally low coupling loss (0.2-0.3 dB per coupler), large bandwidth (over half an octave), high density (large 2-D coupler arrays), polarization diversity, and superior alignment tolerance commensurate with passive alignment techniques. Preliminary experimental validation demonstrates waveguide-to-fiber coupling with a low insertion loss (IL) of 0.9 dB. We foresee that the technology will become a promising solution to the chip-level photonic interconnection and packaging challenges plaguing integrated photonics. |
| first_indexed | 2024-09-23T08:46:09Z |
| format | Article |
| id | mit-1721.1/128033 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:46:09Z |
| publishDate | 2020 |
| publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| record_format | dspace |
| spelling | mit-1721.1/1280332022-09-23T14:26:45Z Optical Free-Form Couplers for High-density Integrated Photonics (OFFCHIP): A Universal Optical Interface Yu, Shaoliang Zuo, Haijie Sun, Xiaochen Liu, Jifeng Gu, Tian Hu, Juejun Massachusetts Institute of Technology. Department of Materials Science and Engineering Coupling of light between different photonic devices, for example on-chip waveguides, fibers, and free-space optical elements, is an essential function enabling integrated optical systems. Efficient optical coupling demands matching the optical mode profiles and effective indices between two devices, and often changing propagation direction of the light. To date, such coupling is pre-dominantly accomplished via direct butt coupling of two devices, or meticulously optimized diffraction gratings. In this article, we present a new coupling scheme based on microfabricated free-form optical reflectors. The free-form reflector simultaneously achieves the functions of light beam re-directing and shaping (for mode matching), and can be versatilely adapted for coupling between photonic chips, fibers, and free-space surface-incident devices. We show that this technology uniquely fulfills all key performance requirements for optical interfaces with exceptionally low coupling loss (0.2-0.3 dB per coupler), large bandwidth (over half an octave), high density (large 2-D coupler arrays), polarization diversity, and superior alignment tolerance commensurate with passive alignment techniques. Preliminary experimental validation demonstrates waveguide-to-fiber coupling with a low insertion loss (IL) of 0.9 dB. We foresee that the technology will become a promising solution to the chip-level photonic interconnection and packaging challenges plaguing integrated photonics. 2020-10-16T21:36:30Z 2020-10-16T21:36:30Z 2020-02 2020-10-06T14:43:35Z Article http://purl.org/eprint/type/JournalArticle 0733-8724 1558-2213 https://hdl.handle.net/1721.1/128033 Yu, Shaoliang et al. "Optical Free-Form Couplers for High-density Integrated Photonics (OFFCHIP): A Universal Optical Interface." Journal of Lightwave Technology 38, 13 (January 2020): 3358 - 3365 © 2020 IEEE en http://dx.doi.org/10.1109/jlt.2020.2971724 Journal of Lightwave Technology Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Institute of Electrical and Electronics Engineers (IEEE) Prof. Hu via Ye Li |
| spellingShingle | Yu, Shaoliang Zuo, Haijie Sun, Xiaochen Liu, Jifeng Gu, Tian Hu, Juejun Optical Free-Form Couplers for High-density Integrated Photonics (OFFCHIP): A Universal Optical Interface |
| title | Optical Free-Form Couplers for High-density Integrated Photonics (OFFCHIP): A Universal Optical Interface |
| title_full | Optical Free-Form Couplers for High-density Integrated Photonics (OFFCHIP): A Universal Optical Interface |
| title_fullStr | Optical Free-Form Couplers for High-density Integrated Photonics (OFFCHIP): A Universal Optical Interface |
| title_full_unstemmed | Optical Free-Form Couplers for High-density Integrated Photonics (OFFCHIP): A Universal Optical Interface |
| title_short | Optical Free-Form Couplers for High-density Integrated Photonics (OFFCHIP): A Universal Optical Interface |
| title_sort | optical free form couplers for high density integrated photonics offchip a universal optical interface |
| url | https://hdl.handle.net/1721.1/128033 |
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