Enhanced Carrier Confinement and Mode Discrimination for Laterally-Coupled DFB Lasers
Reducing carrier leakage is the key to obtain laterally coupled distributed feedback (DFB) lasers with high injection efficiency. We proposed a device structure with slots fabricated between the ridge and gratings to form a good confinement on carriers. The incorporation of slots also makes the grat...
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9790053/ |
| _version_ | 1798039412191264768 |
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| author | Kun Tian Yonggang Zou Mingyue Guan Linlin Shi He Zhang Yingtian Xu Jie Fan Hui Tang Xiaohui Ma |
| author_facet | Kun Tian Yonggang Zou Mingyue Guan Linlin Shi He Zhang Yingtian Xu Jie Fan Hui Tang Xiaohui Ma |
| author_sort | Kun Tian |
| collection | DOAJ |
| description | Reducing carrier leakage is the key to obtain laterally coupled distributed feedback (DFB) lasers with high injection efficiency. We proposed a device structure with slots fabricated between the ridge and gratings to form a good confinement on carriers. The incorporation of slots also makes the grating morphology easier to fabricate. To evaluate the dependence of coupling efficient on main structural parameters, four grating samples with different sizes are studied with FDTD Solutions. Calculation results indicate that slots with a width of <inline-formula><tex-math notation="LaTeX">$0.1\!-\!0.3\;\mu{m}$</tex-math></inline-formula> is suitable for the device. And, changing the lateral width of the grating can be used as a direct method to adjust the coupling strength. In addition, the carrier distribution and optical field distribution of the device were simulated with Crosslight PICS3D, and the results show that compared with the traditional laterally-coupled gratings, this structure can strengthen the competitive advantage of fundamental mode and enhance the mode discrimination of the device. This structural design provides ideas and references for improving the injection efficiency and mode stability of laterally-coupled DFB lasers. |
| first_indexed | 2024-04-11T21:53:31Z |
| format | Article |
| id | doaj.art-e7a71fcfafef4e31816327fbbbef5c99 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-04-11T21:53:31Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-e7a71fcfafef4e31816327fbbbef5c992022-12-22T04:01:11ZengIEEEIEEE Photonics Journal1943-06552022-01-011441710.1109/JPHOT.2022.31807569790053Enhanced Carrier Confinement and Mode Discrimination for Laterally-Coupled DFB LasersKun Tian0https://orcid.org/0000-0002-8276-2425Yonggang Zou1https://orcid.org/0000-0002-3497-807XMingyue Guan2Linlin Shi3He Zhang4https://orcid.org/0000-0002-1669-1358Yingtian Xu5Jie Fan6https://orcid.org/0000-0001-5293-1593Hui Tang7Xiaohui Ma8Changchun University of Science and Technology, Changchun, Jilin, ChinaChangchun University of Science and Technology, Changchun, Jilin, ChinaTsinghua–UC Berkeley Shenzhen Institute, Shenzhen, ChinaChangchun University of Science and Technology, Changchun, Jilin, ChinaChangchun University of Science and Technology, Changchun, Jilin, ChinaChangchun University of Science and Technology, Changchun, Jilin, ChinaChangchun University of Science and Technology, Changchun, Jilin, ChinaChangchun University of Science and Technology, Changchun, Jilin, ChinaChangchun University of Science and Technology, Changchun, Jilin, ChinaReducing carrier leakage is the key to obtain laterally coupled distributed feedback (DFB) lasers with high injection efficiency. We proposed a device structure with slots fabricated between the ridge and gratings to form a good confinement on carriers. The incorporation of slots also makes the grating morphology easier to fabricate. To evaluate the dependence of coupling efficient on main structural parameters, four grating samples with different sizes are studied with FDTD Solutions. Calculation results indicate that slots with a width of <inline-formula><tex-math notation="LaTeX">$0.1\!-\!0.3\;\mu{m}$</tex-math></inline-formula> is suitable for the device. And, changing the lateral width of the grating can be used as a direct method to adjust the coupling strength. In addition, the carrier distribution and optical field distribution of the device were simulated with Crosslight PICS3D, and the results show that compared with the traditional laterally-coupled gratings, this structure can strengthen the competitive advantage of fundamental mode and enhance the mode discrimination of the device. This structural design provides ideas and references for improving the injection efficiency and mode stability of laterally-coupled DFB lasers.https://ieeexplore.ieee.org/document/9790053/DFB lasersgratingsnarrow slotscoupling coefficient |
| spellingShingle | Kun Tian Yonggang Zou Mingyue Guan Linlin Shi He Zhang Yingtian Xu Jie Fan Hui Tang Xiaohui Ma Enhanced Carrier Confinement and Mode Discrimination for Laterally-Coupled DFB Lasers IEEE Photonics Journal DFB lasers gratings narrow slots coupling coefficient |
| title | Enhanced Carrier Confinement and Mode Discrimination for Laterally-Coupled DFB Lasers |
| title_full | Enhanced Carrier Confinement and Mode Discrimination for Laterally-Coupled DFB Lasers |
| title_fullStr | Enhanced Carrier Confinement and Mode Discrimination for Laterally-Coupled DFB Lasers |
| title_full_unstemmed | Enhanced Carrier Confinement and Mode Discrimination for Laterally-Coupled DFB Lasers |
| title_short | Enhanced Carrier Confinement and Mode Discrimination for Laterally-Coupled DFB Lasers |
| title_sort | enhanced carrier confinement and mode discrimination for laterally coupled dfb lasers |
| topic | DFB lasers gratings narrow slots coupling coefficient |
| url | https://ieeexplore.ieee.org/document/9790053/ |
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