Fast Adiabatic Mode Evolution Assisted 2 × 2 Broadband 3 dB Coupler Using Silicon-on-Insulator Fishbone-like Grating Waveguides
We report a novel 2 × 2 broadband 3 dB coupler based on fast adiabatic mode evolution with a compact footprint and large bandwidth. The working principle of the coupler is based on the rapid adiabatic evolution of local eigenmodes of fishbone-like grating waveguides. Different from a traditional adi...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-10-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/13/20/2776 |
| _version_ | 1797572689294000128 |
|---|---|
| author | Yulong Xue Lingxuan Zhang Yangming Ren Yufang Lei Xiaochen Sun |
| author_facet | Yulong Xue Lingxuan Zhang Yangming Ren Yufang Lei Xiaochen Sun |
| author_sort | Yulong Xue |
| collection | DOAJ |
| description | We report a novel 2 × 2 broadband 3 dB coupler based on fast adiabatic mode evolution with a compact footprint and large bandwidth. The working principle of the coupler is based on the rapid adiabatic evolution of local eigenmodes of fishbone-like grating waveguides. Different from a traditional adiabatic coupling method realized by the slow change of the cross-section size of a strip waveguide, a fishbone waveguide allows faster adiabatic transition with proper structure and segment designs. The presented 3 dB coupler achieves a bandwidth range of 168 nm with an imbalance of no greater than ±0.1 dB only for a 9 μm coupling region which significantly improves existing adiabatic broadband couplers. |
| first_indexed | 2024-03-10T20:59:15Z |
| format | Article |
| id | doaj.art-0097d0415dc2423db1ba6f3017313c60 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T20:59:15Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-0097d0415dc2423db1ba6f3017313c602023-11-19T17:35:57ZengMDPI AGNanomaterials2079-49912023-10-011320277610.3390/nano13202776Fast Adiabatic Mode Evolution Assisted 2 × 2 Broadband 3 dB Coupler Using Silicon-on-Insulator Fishbone-like Grating WaveguidesYulong Xue0Lingxuan Zhang1Yangming Ren2Yufang Lei3Xiaochen Sun4State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, ChinaState Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, ChinaState Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, ChinaState Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, ChinaState Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, ChinaWe report a novel 2 × 2 broadband 3 dB coupler based on fast adiabatic mode evolution with a compact footprint and large bandwidth. The working principle of the coupler is based on the rapid adiabatic evolution of local eigenmodes of fishbone-like grating waveguides. Different from a traditional adiabatic coupling method realized by the slow change of the cross-section size of a strip waveguide, a fishbone waveguide allows faster adiabatic transition with proper structure and segment designs. The presented 3 dB coupler achieves a bandwidth range of 168 nm with an imbalance of no greater than ±0.1 dB only for a 9 μm coupling region which significantly improves existing adiabatic broadband couplers.https://www.mdpi.com/2079-4991/13/20/2776fast adiabaticbroadband couplergrating waveguidespower splitterlocal eigenmodes |
| spellingShingle | Yulong Xue Lingxuan Zhang Yangming Ren Yufang Lei Xiaochen Sun Fast Adiabatic Mode Evolution Assisted 2 × 2 Broadband 3 dB Coupler Using Silicon-on-Insulator Fishbone-like Grating Waveguides Nanomaterials fast adiabatic broadband coupler grating waveguides power splitter local eigenmodes |
| title | Fast Adiabatic Mode Evolution Assisted 2 × 2 Broadband 3 dB Coupler Using Silicon-on-Insulator Fishbone-like Grating Waveguides |
| title_full | Fast Adiabatic Mode Evolution Assisted 2 × 2 Broadband 3 dB Coupler Using Silicon-on-Insulator Fishbone-like Grating Waveguides |
| title_fullStr | Fast Adiabatic Mode Evolution Assisted 2 × 2 Broadband 3 dB Coupler Using Silicon-on-Insulator Fishbone-like Grating Waveguides |
| title_full_unstemmed | Fast Adiabatic Mode Evolution Assisted 2 × 2 Broadband 3 dB Coupler Using Silicon-on-Insulator Fishbone-like Grating Waveguides |
| title_short | Fast Adiabatic Mode Evolution Assisted 2 × 2 Broadband 3 dB Coupler Using Silicon-on-Insulator Fishbone-like Grating Waveguides |
| title_sort | fast adiabatic mode evolution assisted 2 2 broadband 3 db coupler using silicon on insulator fishbone like grating waveguides |
| topic | fast adiabatic broadband coupler grating waveguides power splitter local eigenmodes |
| url | https://www.mdpi.com/2079-4991/13/20/2776 |
| work_keys_str_mv | AT yulongxue fastadiabaticmodeevolutionassisted22broadband3dbcouplerusingsilicononinsulatorfishbonelikegratingwaveguides AT lingxuanzhang fastadiabaticmodeevolutionassisted22broadband3dbcouplerusingsilicononinsulatorfishbonelikegratingwaveguides AT yangmingren fastadiabaticmodeevolutionassisted22broadband3dbcouplerusingsilicononinsulatorfishbonelikegratingwaveguides AT yufanglei fastadiabaticmodeevolutionassisted22broadband3dbcouplerusingsilicononinsulatorfishbonelikegratingwaveguides AT xiaochensun fastadiabaticmodeevolutionassisted22broadband3dbcouplerusingsilicononinsulatorfishbonelikegratingwaveguides |