A Demultiplexing Filter With Box-Like Response and Large FSR Based on LNOI Second-Order Micro-Ring Resonators
We propose and experimentally demonstrate a high-performance micro-ring resonator (MRR) with a large free-spectral range (FSR) on the lithium niobate-on-insulator (LNOI) platform. Mode crosstalk happens in LNOI waveguide bends because more than one mode is generated from the anisotropy of lithium ni...
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/9873943/ |
| _version_ | 1811305085348610048 |
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| author | Jingyu Zhang Guohua Hu Binfeng Yun Yiping Cui |
| author_facet | Jingyu Zhang Guohua Hu Binfeng Yun Yiping Cui |
| author_sort | Jingyu Zhang |
| collection | DOAJ |
| description | We propose and experimentally demonstrate a high-performance micro-ring resonator (MRR) with a large free-spectral range (FSR) on the lithium niobate-on-insulator (LNOI) platform. Mode crosstalk happens in LNOI waveguide bends because more than one mode is generated from the anisotropy of lithium niobate, which limits the minimum bending radius of MRRs. Mode properties of ridge waveguides on X-cut LNOI with different bend radii and wavelengths have been analyzed to remove the effect of mode hybridization and reduce the mode crosstalk. On this basis, a small radius MRR with large FSR and 3dB bandwidth is achieved. Further, to deal with the wavelength shift caused by fabrication error, a second-order micro-ring resonators (2<sup>nd</sup>-order MRRs) filter with a box-like response and a high out-of-band rejection ratio is realized. Besides, a multichannel demultiplexing filter is realized based on 2<sup>nd</sup>-order MRRs with low crosstalk (<−13 dB) at a channel spacing of 1.16 nm. The demonstration of the demultiplexing filter with a box-like response paves an important step for high-density photonic integration on the LNOI platform. |
| first_indexed | 2024-04-13T08:20:15Z |
| format | Article |
| id | doaj.art-6293a41414e54669ae08bd119d70bcf2 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-04-13T08:20:15Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-6293a41414e54669ae08bd119d70bcf22022-12-22T02:54:41ZengIEEEIEEE Photonics Journal1943-06552022-01-011461410.1109/JPHOT.2022.32034779873943A Demultiplexing Filter With Box-Like Response and Large FSR Based on LNOI Second-Order Micro-Ring ResonatorsJingyu Zhang0Guohua Hu1https://orcid.org/0000-0002-7492-1393Binfeng Yun2https://orcid.org/0000-0002-3991-8156Yiping Cui3https://orcid.org/0000-0002-4648-2506Advanced Photonics Center, Southeast University, Nanjing, ChinaAdvanced Photonics Center, Southeast University, Nanjing, ChinaAdvanced Photonics Center, Southeast University, Nanjing, ChinaAdvanced Photonics Center, Southeast University, Nanjing, ChinaWe propose and experimentally demonstrate a high-performance micro-ring resonator (MRR) with a large free-spectral range (FSR) on the lithium niobate-on-insulator (LNOI) platform. Mode crosstalk happens in LNOI waveguide bends because more than one mode is generated from the anisotropy of lithium niobate, which limits the minimum bending radius of MRRs. Mode properties of ridge waveguides on X-cut LNOI with different bend radii and wavelengths have been analyzed to remove the effect of mode hybridization and reduce the mode crosstalk. On this basis, a small radius MRR with large FSR and 3dB bandwidth is achieved. Further, to deal with the wavelength shift caused by fabrication error, a second-order micro-ring resonators (2<sup>nd</sup>-order MRRs) filter with a box-like response and a high out-of-band rejection ratio is realized. Besides, a multichannel demultiplexing filter is realized based on 2<sup>nd</sup>-order MRRs with low crosstalk (<−13 dB) at a channel spacing of 1.16 nm. The demonstration of the demultiplexing filter with a box-like response paves an important step for high-density photonic integration on the LNOI platform.https://ieeexplore.ieee.org/document/9873943/LNOIbox-like spectrumWDMMRR |
| spellingShingle | Jingyu Zhang Guohua Hu Binfeng Yun Yiping Cui A Demultiplexing Filter With Box-Like Response and Large FSR Based on LNOI Second-Order Micro-Ring Resonators IEEE Photonics Journal LNOI box-like spectrum WDM MRR |
| title | A Demultiplexing Filter With Box-Like Response and Large FSR Based on LNOI Second-Order Micro-Ring Resonators |
| title_full | A Demultiplexing Filter With Box-Like Response and Large FSR Based on LNOI Second-Order Micro-Ring Resonators |
| title_fullStr | A Demultiplexing Filter With Box-Like Response and Large FSR Based on LNOI Second-Order Micro-Ring Resonators |
| title_full_unstemmed | A Demultiplexing Filter With Box-Like Response and Large FSR Based on LNOI Second-Order Micro-Ring Resonators |
| title_short | A Demultiplexing Filter With Box-Like Response and Large FSR Based on LNOI Second-Order Micro-Ring Resonators |
| title_sort | demultiplexing filter with box like response and large fsr based on lnoi second order micro ring resonators |
| topic | LNOI box-like spectrum WDM MRR |
| url | https://ieeexplore.ieee.org/document/9873943/ |
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