Modulation Performance Enhancement of Directly Modulated Injection-Locked Semiconductor Lasers Using an Equivalent Electrical Circuit
We propose an equivalent electrical circuit model to evaluate the direct modulation performance of optically injection-locked (OIL) semiconductor lasers. We modeled the equivalent circuit of the OIL laser based on alternating complex envelope representations, simulated it using the Simulation Progra...
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| Format: | Article |
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MDPI AG
2021-10-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/10/19/2409 |
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| author | Ho-Jun Bae Jun-Hyung Cho Hyuk-Kee Sung |
| author_facet | Ho-Jun Bae Jun-Hyung Cho Hyuk-Kee Sung |
| author_sort | Ho-Jun Bae |
| collection | DOAJ |
| description | We propose an equivalent electrical circuit model to evaluate the direct modulation performance of optically injection-locked (OIL) semiconductor lasers. We modeled the equivalent circuit of the OIL laser based on alternating complex envelope representations, simulated it using the Simulation Program with Integrated Circuit Emphasis (SPICE), and analyzed the frequency response of the OIL laser. Although the frequency response of the OIL laser is better than that of a free-running laser, its 3-dB modulation performance is degraded by the relaxation oscillation that occurs during direct modulation of the semiconductor laser. To overcome this limitation and maintain the maximum modulation performance within the entire locking range, we also designed an electrical filter to preprocess the electrical modulation signal and compensate for the non-flat modulation output of the OIL laser. The damping ratio of the directly modulated OIL laser increased by 0.101 (280%) and its settling time decreased by >0.037 (44%) when the electrical compensation circuit was added, exhibiting a flat 3-dB modulation bandwidth of 28.79 GHz. |
| first_indexed | 2024-03-10T07:03:34Z |
| format | Article |
| id | doaj.art-281dc335bb934a1cb1feb066c80cc33f |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-10T07:03:34Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-281dc335bb934a1cb1feb066c80cc33f2023-11-22T15:57:19ZengMDPI AGElectronics2079-92922021-10-011019240910.3390/electronics10192409Modulation Performance Enhancement of Directly Modulated Injection-Locked Semiconductor Lasers Using an Equivalent Electrical CircuitHo-Jun Bae0Jun-Hyung Cho1Hyuk-Kee Sung2Research Institute of Science and Technology, Hongik University, Seoul 04066, KoreaResearch Institute of Science and Technology, Hongik University, Seoul 04066, KoreaSchool of Electronic and Electrical Engineering, Hongik University, Seoul 04066, KoreaWe propose an equivalent electrical circuit model to evaluate the direct modulation performance of optically injection-locked (OIL) semiconductor lasers. We modeled the equivalent circuit of the OIL laser based on alternating complex envelope representations, simulated it using the Simulation Program with Integrated Circuit Emphasis (SPICE), and analyzed the frequency response of the OIL laser. Although the frequency response of the OIL laser is better than that of a free-running laser, its 3-dB modulation performance is degraded by the relaxation oscillation that occurs during direct modulation of the semiconductor laser. To overcome this limitation and maintain the maximum modulation performance within the entire locking range, we also designed an electrical filter to preprocess the electrical modulation signal and compensate for the non-flat modulation output of the OIL laser. The damping ratio of the directly modulated OIL laser increased by 0.101 (280%) and its settling time decreased by >0.037 (44%) when the electrical compensation circuit was added, exhibiting a flat 3-dB modulation bandwidth of 28.79 GHz.https://www.mdpi.com/2079-9292/10/19/2409semiconductor laserequivalent circuitSPICEoptically injection-locked laserdirect modulationfrequency response |
| spellingShingle | Ho-Jun Bae Jun-Hyung Cho Hyuk-Kee Sung Modulation Performance Enhancement of Directly Modulated Injection-Locked Semiconductor Lasers Using an Equivalent Electrical Circuit Electronics semiconductor laser equivalent circuit SPICE optically injection-locked laser direct modulation frequency response |
| title | Modulation Performance Enhancement of Directly Modulated Injection-Locked Semiconductor Lasers Using an Equivalent Electrical Circuit |
| title_full | Modulation Performance Enhancement of Directly Modulated Injection-Locked Semiconductor Lasers Using an Equivalent Electrical Circuit |
| title_fullStr | Modulation Performance Enhancement of Directly Modulated Injection-Locked Semiconductor Lasers Using an Equivalent Electrical Circuit |
| title_full_unstemmed | Modulation Performance Enhancement of Directly Modulated Injection-Locked Semiconductor Lasers Using an Equivalent Electrical Circuit |
| title_short | Modulation Performance Enhancement of Directly Modulated Injection-Locked Semiconductor Lasers Using an Equivalent Electrical Circuit |
| title_sort | modulation performance enhancement of directly modulated injection locked semiconductor lasers using an equivalent electrical circuit |
| topic | semiconductor laser equivalent circuit SPICE optically injection-locked laser direct modulation frequency response |
| url | https://www.mdpi.com/2079-9292/10/19/2409 |
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