Nanosecond-scale discrete wavelength switching in feedback-controlled single-gain-section multi-wavelength lasers
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866915816655552512 |
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| author | Ladouce, Mathieu Marin-Palomo, Pablo Virte, Martin |
| author_facet | Ladouce, Mathieu Marin-Palomo, Pablo Virte, Martin |
| contents | We investigate discrete wavelength switching in single-gain-section multi-wavelength lasers monolithically integrated on InP with phase-controlled optical-feedback. By modulating the feedback phase, nanosecond-scale wavelength switching is experimentally demonstrated with transition times below 2.5 ns. Measurements consistently show that the switching time decreases with stronger optical feedback and larger phase-modulation amplitudes. Transitions from lower to higher modal gain are faster. We support the experimental observations with a multi-mode extension of the Lang-Kobayashi rate-equation model. We analyze the influence of laser, feedback-cavity, and modulation parameters on the switching dynamics, and highlight the role of mode coupling. These results highlight the potential of integrated multi-wavelength lasers for compact and high-speed all-optical networking systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_22053 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Nanosecond-scale discrete wavelength switching in feedback-controlled single-gain-section multi-wavelength lasers Ladouce, Mathieu Marin-Palomo, Pablo Virte, Martin Optics We investigate discrete wavelength switching in single-gain-section multi-wavelength lasers monolithically integrated on InP with phase-controlled optical-feedback. By modulating the feedback phase, nanosecond-scale wavelength switching is experimentally demonstrated with transition times below 2.5 ns. Measurements consistently show that the switching time decreases with stronger optical feedback and larger phase-modulation amplitudes. Transitions from lower to higher modal gain are faster. We support the experimental observations with a multi-mode extension of the Lang-Kobayashi rate-equation model. We analyze the influence of laser, feedback-cavity, and modulation parameters on the switching dynamics, and highlight the role of mode coupling. These results highlight the potential of integrated multi-wavelength lasers for compact and high-speed all-optical networking systems. |
| title | Nanosecond-scale discrete wavelength switching in feedback-controlled single-gain-section multi-wavelength lasers |
| topic | Optics |
| url | https://arxiv.org/abs/2602.22053 |