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| Format: | Preprint |
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2024
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| Online-Zugang: | https://arxiv.org/abs/2407.09266 |
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| _version_ | 1866910525037740032 |
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| author | Murphy, Leah R Olszewski, Mateusz J Androvitsaneas, Petros Perez, Miguel Alvarez Smith, Will A M Bennett, Anthony J Mosley, Peter J Davis, Alex O C |
| author_facet | Murphy, Leah R Olszewski, Mateusz J Androvitsaneas, Petros Perez, Miguel Alvarez Smith, Will A M Bennett, Anthony J Mosley, Peter J Davis, Alex O C |
| contents | Future quantum networks will rely on the ability to coherently transfer optically encoded quantum information between different wavelength bands. Bragg-scattering four-wave mixing in optical fiber is a promising route to achieving this, but requires fibers with precise dispersion control and broadband transmission at signal, target and pump wavelengths. Here we introduce a photonic crystal fiber with a germanium-doped core featuring group velocity matching at 1550 nm, the telecoms C-band, and 920 nm, within the emission range of efficient single photon sources based on InAs quantum dots. With low chromatic walk-off and good optical guidance even at long wavelengths, large lengths of this fiber are used to achieve nanometer-scale frequency shifts between wavelengths around 920 nm with up to 79.4\% internal conversion efficiency, allowing dissimilar InAs dots to be interfaced. We also show how cascading this frequency conversion can be used to generate a frequency comb away from telecoms wavelengths. Finally, we use the fiber to demonstrate tunable frequency conversion of weak classical signals around 918 nm to the telecoms C-band. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_09266 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Tunable frequency conversion in doped photonic crystal fiber pumped near degeneracy Murphy, Leah R Olszewski, Mateusz J Androvitsaneas, Petros Perez, Miguel Alvarez Smith, Will A M Bennett, Anthony J Mosley, Peter J Davis, Alex O C Optics Quantum Physics Future quantum networks will rely on the ability to coherently transfer optically encoded quantum information between different wavelength bands. Bragg-scattering four-wave mixing in optical fiber is a promising route to achieving this, but requires fibers with precise dispersion control and broadband transmission at signal, target and pump wavelengths. Here we introduce a photonic crystal fiber with a germanium-doped core featuring group velocity matching at 1550 nm, the telecoms C-band, and 920 nm, within the emission range of efficient single photon sources based on InAs quantum dots. With low chromatic walk-off and good optical guidance even at long wavelengths, large lengths of this fiber are used to achieve nanometer-scale frequency shifts between wavelengths around 920 nm with up to 79.4\% internal conversion efficiency, allowing dissimilar InAs dots to be interfaced. We also show how cascading this frequency conversion can be used to generate a frequency comb away from telecoms wavelengths. Finally, we use the fiber to demonstrate tunable frequency conversion of weak classical signals around 918 nm to the telecoms C-band. |
| title | Tunable frequency conversion in doped photonic crystal fiber pumped near degeneracy |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2407.09266 |