Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2504.11965 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908412367863808 |
|---|---|
| author | Wang, T. Ma, Y. Li, Z. Li, Y. Tu, Z. Zhang, Y. Xu, G. Baland, S. Xiang, S. Hao, Y. |
| author_facet | Wang, T. Ma, Y. Li, Z. Li, Y. Tu, Z. Zhang, Y. Xu, G. Baland, S. Xiang, S. Hao, Y. |
| contents | We demonstrate harmonic mode-locking in a semiconductor VCSEL using polarization-controlled delayed feedback. By integrating a rotatable $λ$/2-plate within an external cavity, we achieve precise control over pulse multiplicity and repetition rates in TE and TM modes. For the TE mode, increasing the $λ$/2-plate angle ($θ$) transitions the system from disordered quasi-periodic states to stable fundamental (single-pulse) and harmonic dual-pulse mode-locking. Polarization-resolved measurements and cross-correlation analyses reveal coherent pulse alignment at half the cavity roundtrip time, enabled by polarization-mediated nonlinear dynamics. This work establishes cross-polarization feedback as a fundamental mechanism for ultrafast pulse engineering, advancing the understanding of polarization-mediated nonlinear dynamics in laser physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_11965 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Mode locking via delayed orthogonal-polarization reinjection in semiconductor VCSELs Wang, T. Ma, Y. Li, Z. Li, Y. Tu, Z. Zhang, Y. Xu, G. Baland, S. Xiang, S. Hao, Y. Optics We demonstrate harmonic mode-locking in a semiconductor VCSEL using polarization-controlled delayed feedback. By integrating a rotatable $λ$/2-plate within an external cavity, we achieve precise control over pulse multiplicity and repetition rates in TE and TM modes. For the TE mode, increasing the $λ$/2-plate angle ($θ$) transitions the system from disordered quasi-periodic states to stable fundamental (single-pulse) and harmonic dual-pulse mode-locking. Polarization-resolved measurements and cross-correlation analyses reveal coherent pulse alignment at half the cavity roundtrip time, enabled by polarization-mediated nonlinear dynamics. This work establishes cross-polarization feedback as a fundamental mechanism for ultrafast pulse engineering, advancing the understanding of polarization-mediated nonlinear dynamics in laser physics. |
| title | Mode locking via delayed orthogonal-polarization reinjection in semiconductor VCSELs |
| topic | Optics |
| url | https://arxiv.org/abs/2504.11965 |