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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2504.13773 |
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| _version_ | 1866909584287858688 |
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| author | Nunn, Cory Lal, Nijil Burenkov, Ivan Li-Baboud, Ya-Shian Kuo, Paulina S. Gerrits, Thomas Polyakov, Sergey V. |
| author_facet | Nunn, Cory Lal, Nijil Burenkov, Ivan Li-Baboud, Ya-Shian Kuo, Paulina S. Gerrits, Thomas Polyakov, Sergey V. |
| contents | We demonstrate picosecond-level synchronization of two actively mode-locked Ti:Sapphire lasers via the White Rabbit Precision Time Protocol (WR-PTP), tested over 120 km of deployed optical fiber. This synchronization capability, in combination with the highly single-mode, transform-limited pulses produced by each laser, enables their use as pump lasers for indistinguishable photon sources at remote locations in a quantum network. Here, the WR-PTP serves as a scalable network synchronization protocol, and its performance is compared to traditional methods of local synchronization. We demonstrate pulse-to-pulse synchronization better than 3 ps and time deviation (TDEV) values below 4 ps for all averaging times up to 10 s. With a designed coherence time of 35 ps for single photon sources utilizing these lasers, the achievable temporal overlap corresponds to 98 % Hong-Ou-Mandel (HOM) interference visibility between independent sources. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_13773 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Picosecond synchronization of mode-locked lasers for metropolitan-scale quantum networks Nunn, Cory Lal, Nijil Burenkov, Ivan Li-Baboud, Ya-Shian Kuo, Paulina S. Gerrits, Thomas Polyakov, Sergey V. Quantum Physics We demonstrate picosecond-level synchronization of two actively mode-locked Ti:Sapphire lasers via the White Rabbit Precision Time Protocol (WR-PTP), tested over 120 km of deployed optical fiber. This synchronization capability, in combination with the highly single-mode, transform-limited pulses produced by each laser, enables their use as pump lasers for indistinguishable photon sources at remote locations in a quantum network. Here, the WR-PTP serves as a scalable network synchronization protocol, and its performance is compared to traditional methods of local synchronization. We demonstrate pulse-to-pulse synchronization better than 3 ps and time deviation (TDEV) values below 4 ps for all averaging times up to 10 s. With a designed coherence time of 35 ps for single photon sources utilizing these lasers, the achievable temporal overlap corresponds to 98 % Hong-Ou-Mandel (HOM) interference visibility between independent sources. |
| title | Picosecond synchronization of mode-locked lasers for metropolitan-scale quantum networks |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2504.13773 |