Compact, Broadband and Low-Loss Polarization Beam Splitter on Lithium-Niobate-On-Insulator Using a Silicon Nanowire Assisted Waveguide
We propose a compact, broadband, and low-loss polarization beam splitter (PBS) based on an asymmetrical directional coupler on the lithium-niobate-on-insulator platform, consisting of an amorphous silicon (a-Si) assisted waveguide, and a normal waveguide. With proper design of the a-Si nanowire, and...
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IEEE
2020-01-01
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| Online Access: | https://ieeexplore.ieee.org/document/9200714/ |
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| author | L. Zhang L. Zhang X. Fu L. Yang |
| author_facet | L. Zhang L. Zhang X. Fu L. Yang |
| author_sort | L. Zhang |
| collection | DOAJ |
| description | We propose a compact, broadband, and low-loss polarization beam splitter (PBS) based on an asymmetrical directional coupler on the lithium-niobate-on-insulator platform, consisting of an amorphous silicon (a-Si) assisted waveguide, and a normal waveguide. With proper design of the a-Si nanowire, and lithium niobate waveguides, the phase-matching condition is satisfied for TE polarization, while significant mismatching exists for TM polarization. A 16-<inline-formula><tex-math notation="LaTeX">$\mu$</tex-math></inline-formula>m-long PBS (including the s-bend region) with a 200 nm gap is achieved. Numerical simulations show that the PBS exhibits a 140-nm bandwidth for extinction ratios lager than 10 dB. Moreover, the device has an ultra-low insertion loss (IL <inline-formula><tex-math notation="LaTeX">$\sim$</tex-math></inline-formula> 0.05 dB), and maintaining ILs <inline-formula><tex-math notation="LaTeX">$< $</tex-math></inline-formula> 0.5 dB over a 170 nm wavelength range. |
| format | Article |
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| institution | Matheson Library |
| issn | 1943-0655 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | IEEE |
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| series | IEEE Photonics Journal |
| spelling | doaj-art-6c4b8b51d72b4515a4837c69f62fadb52025-07-01T23:55:45ZengIEEEIEEE Photonics Journal1943-06552020-01-011251610.1109/JPHOT.2020.30250179200714Compact, Broadband and Low-Loss Polarization Beam Splitter on Lithium-Niobate-On-Insulator Using a Silicon Nanowire Assisted WaveguideL. Zhang0L. Zhang1https://orcid.org/0000-0002-9442-3623X. Fu2L. Yang3https://orcid.org/0000-0003-0671-6459State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences Center of Materials Science, and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences Center of Materials Science, and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences Center of Materials Science, and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences Center of Materials Science, and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaWe propose a compact, broadband, and low-loss polarization beam splitter (PBS) based on an asymmetrical directional coupler on the lithium-niobate-on-insulator platform, consisting of an amorphous silicon (a-Si) assisted waveguide, and a normal waveguide. With proper design of the a-Si nanowire, and lithium niobate waveguides, the phase-matching condition is satisfied for TE polarization, while significant mismatching exists for TM polarization. A 16-<inline-formula><tex-math notation="LaTeX">$\mu$</tex-math></inline-formula>m-long PBS (including the s-bend region) with a 200 nm gap is achieved. Numerical simulations show that the PBS exhibits a 140-nm bandwidth for extinction ratios lager than 10 dB. Moreover, the device has an ultra-low insertion loss (IL <inline-formula><tex-math notation="LaTeX">$\sim$</tex-math></inline-formula> 0.05 dB), and maintaining ILs <inline-formula><tex-math notation="LaTeX">$< $</tex-math></inline-formula> 0.5 dB over a 170 nm wavelength range.https://ieeexplore.ieee.org/document/9200714/Asymmetric directional couplerlnoipolarization beam splitter |
| spellingShingle | L. Zhang L. Zhang X. Fu L. Yang Compact, Broadband and Low-Loss Polarization Beam Splitter on Lithium-Niobate-On-Insulator Using a Silicon Nanowire Assisted Waveguide IEEE Photonics Journal Asymmetric directional coupler lnoi polarization beam splitter |
| title | Compact, Broadband and Low-Loss Polarization Beam Splitter on Lithium-Niobate-On-Insulator Using a Silicon Nanowire Assisted Waveguide |
| title_full | Compact, Broadband and Low-Loss Polarization Beam Splitter on Lithium-Niobate-On-Insulator Using a Silicon Nanowire Assisted Waveguide |
| title_fullStr | Compact, Broadband and Low-Loss Polarization Beam Splitter on Lithium-Niobate-On-Insulator Using a Silicon Nanowire Assisted Waveguide |
| title_full_unstemmed | Compact, Broadband and Low-Loss Polarization Beam Splitter on Lithium-Niobate-On-Insulator Using a Silicon Nanowire Assisted Waveguide |
| title_short | Compact, Broadband and Low-Loss Polarization Beam Splitter on Lithium-Niobate-On-Insulator Using a Silicon Nanowire Assisted Waveguide |
| title_sort | compact broadband and low loss polarization beam splitter on lithium niobate on insulator using a silicon nanowire assisted waveguide |
| topic | Asymmetric directional coupler lnoi polarization beam splitter |
| url | https://ieeexplore.ieee.org/document/9200714/ |
| work_keys_str_mv | AT lzhang compactbroadbandandlowlosspolarizationbeamsplitteronlithiumniobateoninsulatorusingasiliconnanowireassistedwaveguide AT lzhang compactbroadbandandlowlosspolarizationbeamsplitteronlithiumniobateoninsulatorusingasiliconnanowireassistedwaveguide AT xfu compactbroadbandandlowlosspolarizationbeamsplitteronlithiumniobateoninsulatorusingasiliconnanowireassistedwaveguide AT lyang compactbroadbandandlowlosspolarizationbeamsplitteronlithiumniobateoninsulatorusingasiliconnanowireassistedwaveguide |