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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Online-Zugang: | https://arxiv.org/abs/2509.08419 |
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| _version_ | 1866918321764433920 |
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| author | Johnson, Stanley Mishra, Sandeep Pathak, Anirban De, Subhadeep |
| author_facet | Johnson, Stanley Mishra, Sandeep Pathak, Anirban De, Subhadeep |
| contents | Phase coherent fibers (PCF) are essential to distribute nearly monochromatic photons, ultra-stable in their frequency and phases, which have demanding requirements for state-of-the-art networked experiments, quantum as well as very high-speed communications. We report the development of a novel system that produces PCF links, also actively corrects the unavoidable slow frequency drift of the source laser. The PCF follows white phase noise limited $σ_o \times τ^{-1}$ stability behavior having $σ_o$ values $1.9(2) \times 10^{-16}$ and $2.6(1) \times 10^{-16}$ for a 3.3 km field-deployed and 71 km spool fibers, respectively, with up to 47.5 dB suppression of the phase noise compared to a normal fiber. Additionally, the system is featured to correct the source laser's 33.8 mHz/s frequency drift to as low as $\simeq 0.05$ mHz/s. Therefore, this all-in-one solution producing a quantum link can potentially enhance the effectiveness of the twin field quantum key distribution (TF-QKD) by nearly a 73-fold reduction of the QBER that arises from using unstabilized fiber links, as well as relaxes the laser frequency drift correction constraints by severalfold. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_08419 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Frequency drift corrected ultra-stable laser through phase-coherent fiber producing a quantum channel Johnson, Stanley Mishra, Sandeep Pathak, Anirban De, Subhadeep Quantum Physics Phase coherent fibers (PCF) are essential to distribute nearly monochromatic photons, ultra-stable in their frequency and phases, which have demanding requirements for state-of-the-art networked experiments, quantum as well as very high-speed communications. We report the development of a novel system that produces PCF links, also actively corrects the unavoidable slow frequency drift of the source laser. The PCF follows white phase noise limited $σ_o \times τ^{-1}$ stability behavior having $σ_o$ values $1.9(2) \times 10^{-16}$ and $2.6(1) \times 10^{-16}$ for a 3.3 km field-deployed and 71 km spool fibers, respectively, with up to 47.5 dB suppression of the phase noise compared to a normal fiber. Additionally, the system is featured to correct the source laser's 33.8 mHz/s frequency drift to as low as $\simeq 0.05$ mHz/s. Therefore, this all-in-one solution producing a quantum link can potentially enhance the effectiveness of the twin field quantum key distribution (TF-QKD) by nearly a 73-fold reduction of the QBER that arises from using unstabilized fiber links, as well as relaxes the laser frequency drift correction constraints by severalfold. |
| title | Frequency drift corrected ultra-stable laser through phase-coherent fiber producing a quantum channel |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2509.08419 |