Application-Oriented Investigation of Parasitic Limitation on Multilevel Modulation of High-Speed VCSELs
In this paper, we present an application-oriented investigation of parasitic limitation on the large signal performance of VCSELs when multilevel modulation is applied. VCSELs with different damping are taken into consideration. The parasitic parameters are extracted by fitting the measured <inli...
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IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8692714/ |
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| author | Chenyu Liang Wenjia Zhang Qing Wang Shun Yao Zuyuan He |
| author_facet | Chenyu Liang Wenjia Zhang Qing Wang Shun Yao Zuyuan He |
| author_sort | Chenyu Liang |
| collection | DOAJ |
| description | In this paper, we present an application-oriented investigation of parasitic limitation on the large signal performance of VCSELs when multilevel modulation is applied. VCSELs with different damping are taken into consideration. The parasitic parameters are extracted by fitting the measured <inline-formula><tex-math notation="LaTeX">$S_{11}$</tex-math></inline-formula> data toward a frequency of 40 GHz. In the large signal analysis, four-level pulse amplitude modulation (PAM-4) signaling is embedded into the tool of VCSEL integrated spatio-temporal advanced simulator (VISTAS) and analyzed with extracted parameters. The transmitter and dispersion eye closure quaternary (TDECQ) of the 50-Gb/s PAM-4 signals from VCSEL model is evaluated to understand the relationship between parasitic parameters and signal quality. It is found that the over-damped VCSEL would benefit from larger parasitic bandwidth for PAM-4 modulation while the under-damped VCSEL with moderate parasitic bandwidth would present the best large signal response for PAM-4 modulation. The results indicate that for multilevel modulation, the parasitic parameters need to be carefully designed according to the VCSEL intrinsic parameters to achieve better large signal performance. By co-optimizing the key parasitic parameters, the parasitic circuit design criteria for each type of VCSEL are provided to obtain the best large signal performance under multilevel modulation. The results could provide a designing guidance for VCSELs aiming at multilevel modulation applications. |
| format | Article |
| id | doaj-art-a97f3e9368e941be8f19be8cea643359 |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-a97f3e9368e941be8f19be8cea6433592025-08-20T03:15:48ZengIEEEIEEE Photonics Journal1943-06552019-01-0111311010.1109/JPHOT.2019.29113068692714Application-Oriented Investigation of Parasitic Limitation on Multilevel Modulation of High-Speed VCSELsChenyu Liang0https://orcid.org/0000-0002-5318-9412Wenjia Zhang1https://orcid.org/0000-0002-9545-1124Qing Wang2Shun Yao3Zuyuan He4https://orcid.org/0000-0002-7499-834XState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaInstitute of Laser Engineering, Beijing University of Technology, Beijing, ChinaInstitute of Laser Engineering, Beijing University of Technology, Beijing, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaIn this paper, we present an application-oriented investigation of parasitic limitation on the large signal performance of VCSELs when multilevel modulation is applied. VCSELs with different damping are taken into consideration. The parasitic parameters are extracted by fitting the measured <inline-formula><tex-math notation="LaTeX">$S_{11}$</tex-math></inline-formula> data toward a frequency of 40 GHz. In the large signal analysis, four-level pulse amplitude modulation (PAM-4) signaling is embedded into the tool of VCSEL integrated spatio-temporal advanced simulator (VISTAS) and analyzed with extracted parameters. The transmitter and dispersion eye closure quaternary (TDECQ) of the 50-Gb/s PAM-4 signals from VCSEL model is evaluated to understand the relationship between parasitic parameters and signal quality. It is found that the over-damped VCSEL would benefit from larger parasitic bandwidth for PAM-4 modulation while the under-damped VCSEL with moderate parasitic bandwidth would present the best large signal response for PAM-4 modulation. The results indicate that for multilevel modulation, the parasitic parameters need to be carefully designed according to the VCSEL intrinsic parameters to achieve better large signal performance. By co-optimizing the key parasitic parameters, the parasitic circuit design criteria for each type of VCSEL are provided to obtain the best large signal performance under multilevel modulation. The results could provide a designing guidance for VCSELs aiming at multilevel modulation applications.https://ieeexplore.ieee.org/document/8692714/Multimode VCSELparasiticPAM-4TDECQoptical interconnect. |
| spellingShingle | Chenyu Liang Wenjia Zhang Qing Wang Shun Yao Zuyuan He Application-Oriented Investigation of Parasitic Limitation on Multilevel Modulation of High-Speed VCSELs IEEE Photonics Journal Multimode VCSEL parasitic PAM-4 TDECQ optical interconnect. |
| title | Application-Oriented Investigation of Parasitic Limitation on Multilevel Modulation of High-Speed VCSELs |
| title_full | Application-Oriented Investigation of Parasitic Limitation on Multilevel Modulation of High-Speed VCSELs |
| title_fullStr | Application-Oriented Investigation of Parasitic Limitation on Multilevel Modulation of High-Speed VCSELs |
| title_full_unstemmed | Application-Oriented Investigation of Parasitic Limitation on Multilevel Modulation of High-Speed VCSELs |
| title_short | Application-Oriented Investigation of Parasitic Limitation on Multilevel Modulation of High-Speed VCSELs |
| title_sort | application oriented investigation of parasitic limitation on multilevel modulation of high speed vcsels |
| topic | Multimode VCSEL parasitic PAM-4 TDECQ optical interconnect. |
| url | https://ieeexplore.ieee.org/document/8692714/ |
| work_keys_str_mv | AT chenyuliang applicationorientedinvestigationofparasiticlimitationonmultilevelmodulationofhighspeedvcsels AT wenjiazhang applicationorientedinvestigationofparasiticlimitationonmultilevelmodulationofhighspeedvcsels AT qingwang applicationorientedinvestigationofparasiticlimitationonmultilevelmodulationofhighspeedvcsels AT shunyao applicationorientedinvestigationofparasiticlimitationonmultilevelmodulationofhighspeedvcsels AT zuyuanhe applicationorientedinvestigationofparasiticlimitationonmultilevelmodulationofhighspeedvcsels |