High-Performance Microwave-Frequency Comb Generation Based on Directly Modulated Laser with Filtering Operations
In this paper, a scheme for generating high-quality tunable microwave-frequency combs (MFCs) is proposed. The proposed scheme is based on an initially non-flat MFC generated by a directly modulated laser operating in gain-switching status. Filtering operations are used to increase the flatness of th...
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| Format: | Article |
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MDPI AG
2025-04-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/12/5/433 |
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| author | Qianyou Long Yang Jiang Jing Xu Xiaohong Lan Jinjian Feng Jiancheng Yu Yunkun Luo Tingyi Jiang Hui Zhang Yu Wu |
| author_facet | Qianyou Long Yang Jiang Jing Xu Xiaohong Lan Jinjian Feng Jiancheng Yu Yunkun Luo Tingyi Jiang Hui Zhang Yu Wu |
| author_sort | Qianyou Long |
| collection | DOAJ |
| description | In this paper, a scheme for generating high-quality tunable microwave-frequency combs (MFCs) is proposed. The proposed scheme is based on an initially non-flat MFC generated by a directly modulated laser operating in gain-switching status. Filtering operations are used to increase the flatness of the MFC. Concretely, by employing an optical bandpass filter and a two-tap negative-coefficient microwave photonic filter, the flatness of the MFC is significantly optimized. In the experiment, MFCs with adjustable comb spacing from 0.5 GHz to 1.6 GHz and bandwidths ranging from 0 to 26.5 GHz are generated. The flatness is better than ±2.5 dB for the MFC. The proposed scheme provides a simple, efficient, and high-performance solution for generating MFCs, making it a promising candidate for various applications requiring high-quality MFC sources. |
| format | Article |
| id | doaj-art-50be0230f6974bcdb2b5b533f0f9b68c |
| institution | OA Journals |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-50be0230f6974bcdb2b5b533f0f9b68c2025-08-20T01:56:35ZengMDPI AGPhotonics2304-67322025-04-0112543310.3390/photonics12050433High-Performance Microwave-Frequency Comb Generation Based on Directly Modulated Laser with Filtering OperationsQianyou Long0Yang Jiang1Jing Xu2Xiaohong Lan3Jinjian Feng4Jiancheng Yu5Yunkun Luo6Tingyi Jiang7Hui Zhang8Yu Wu9College of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaIn this paper, a scheme for generating high-quality tunable microwave-frequency combs (MFCs) is proposed. The proposed scheme is based on an initially non-flat MFC generated by a directly modulated laser operating in gain-switching status. Filtering operations are used to increase the flatness of the MFC. Concretely, by employing an optical bandpass filter and a two-tap negative-coefficient microwave photonic filter, the flatness of the MFC is significantly optimized. In the experiment, MFCs with adjustable comb spacing from 0.5 GHz to 1.6 GHz and bandwidths ranging from 0 to 26.5 GHz are generated. The flatness is better than ±2.5 dB for the MFC. The proposed scheme provides a simple, efficient, and high-performance solution for generating MFCs, making it a promising candidate for various applications requiring high-quality MFC sources.https://www.mdpi.com/2304-6732/12/5/433microwave-frequency combdirectly modulated lasergain-switching statusfiltering process |
| spellingShingle | Qianyou Long Yang Jiang Jing Xu Xiaohong Lan Jinjian Feng Jiancheng Yu Yunkun Luo Tingyi Jiang Hui Zhang Yu Wu High-Performance Microwave-Frequency Comb Generation Based on Directly Modulated Laser with Filtering Operations Photonics microwave-frequency comb directly modulated laser gain-switching status filtering process |
| title | High-Performance Microwave-Frequency Comb Generation Based on Directly Modulated Laser with Filtering Operations |
| title_full | High-Performance Microwave-Frequency Comb Generation Based on Directly Modulated Laser with Filtering Operations |
| title_fullStr | High-Performance Microwave-Frequency Comb Generation Based on Directly Modulated Laser with Filtering Operations |
| title_full_unstemmed | High-Performance Microwave-Frequency Comb Generation Based on Directly Modulated Laser with Filtering Operations |
| title_short | High-Performance Microwave-Frequency Comb Generation Based on Directly Modulated Laser with Filtering Operations |
| title_sort | high performance microwave frequency comb generation based on directly modulated laser with filtering operations |
| topic | microwave-frequency comb directly modulated laser gain-switching status filtering process |
| url | https://www.mdpi.com/2304-6732/12/5/433 |
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