Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Resource-efficient frequency conversion for quantum networks \\via cascaded four-wave mixing

Thomas A. Wright, Charlotte Parry, Oliver R. Gibson, Robert J. A. Francis-Jones, Peter J. Mosley

Published May 22, 2020• 0 citations
OpenAlex

Abstract

We report a resource-efficient scheme in which a single pump laser was used to achieve frequency conversion by Bragg-scattering four-wave mixing in a photonic crystal fiber. We demonstrate bidirectional conversion of coherent light between Sr+ P1/2 - D3/2 emission wavelength at 1092 nm and the telecommunication C band with conversion efficiencies of 4.2 % and 37 % for up- and down-conversion, respectively. We discuss how the scheme may be viably scaled to meet the temporal, spectral and polarisation stability requirements of a hybrid light-matter quantum network.

Related papers

Resource-efficient frequency conversion for quantum networks via sequential four-wave mixing

T. A. Wright, Charlotte Parry, O. R. Gibson +2 more

We report a resource-efficient scheme in which a single pump laser was used to achieve frequency conversion by Bragg-scattering four-wave mixing in a photonic crystal fiber. We demonstrate bidirectional conversion of coherent light between S r + 2 P 1 / 2 → 2 D 3 / 2 emission wavelength at 1092 nm and the telecommunication C band with conversion efficiencies of 4.2% and 37% for up- and down-conversion, respectively. We discuss how the scheme may be viably scaled to meet the temporal, spectral, and polarization stability requirements of a hybrid light–matter quantum network.

arXiv:2005.11227•Optics Letters•Jul 10, 2020•12 citations

Two-Way Photonic Interface for Linking the Sr+ Transition at 422 nm to the Telecommunication C Band

Thomas A. Wright, Robert J. A. Francis-Jones, Corin B. E. Gawith +7 more

Trapped ions have achieved the highest fidelity in local processing of quantum information, but their short emission wavelengths are incompatible with long-distance distribution of information at telecom wavelengths, which prevents their use in a large-scale quantum network. We present an interface capable of two-way frequency conversion of single photons between a Sr${}^{+}$ node-compatible wavelength and the telecom $C$ band, forming part of a critical pathway for future hybrid light-matter quantum networks. This scheme offers bidirectional translation of widely separated frequencies in a single stage, with noise levels low enough for high-fidelity interconnects.

arXiv:1802.07947•Physical Review Applied•Oct 4, 2018•18 citations

High-efficiency frequency conversion in the single-photon regime

Alex S. Clark, Shayan Shahnia, Matthew J. Collins +2 more

In this Letter we demonstrate frequency conversion in the single-photon regime through Bragg-scattering four-wave mixing with near-unit efficiency in a 750 m long commercially available dispersion-engineered highly nonlinear fiber, where all photons and pump laser frequencies are in the low-loss telecommunications band. We achieve 99.1%±4.9% downconversion and 98.0%±5.0% upconversion of photons by 12 nm using a weak coherent state with an average input of 0.27 photons per detection gate window.

Optics Letters•Mar 11, 2013•66 citations

Group-velocity symmetry in photonic crystal fibre for ultra-tunable quantum frequency conversion

Charlotte Parry, Philip B. Main, T A Wright +1 more

Abstract Low-noise frequency conversion of single photons is a critical tool in establishing fibre-based quantum networks. We show that a single photonic crystal fibre can achieve frequency conversion by Bragg-scattering four-wave mixing of source photons from an ultra-broad wavelength range by engineering a symmetric group velocity profile. Furthermore, we discuss how pump tuning can mitigate realistic discrepancies in device fabrication. This enables a single highly adaptable frequency conversion interface to link disparate nodes in a quantum network via the telecoms band.

arXiv:2103.04824•Journal of Optics•May 17, 2021•6 citations

Tunable frequency conversion in doped photonic crystal fiber pumped near degeneracy

Leah R. Murphy, Mateusz J. Olszewski, Petros Androvitsaneas +5 more

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.

arXiv:2407.09266•Optica•Oct 9, 2024•8 citations

Tunable near-degenerate frequency conversion using doped photonic crystal fibre

Leah R. Murphy, Mateusz J. Olszewski, Petros Androvitsaneas +4 more

Future quantum communication networks will rely on the ability to coherently transfer quantum information between different wavelength bands. Coherent frequency conversion in optical fibre by Bragg-scattering fourwave mixing is a promising route to achieving this, but requires fibres with precise dispersion control and broadband transmission at signal, target and pump wavelengths. Here we introduce a photonic crystal fibre with a germania-doped core, for which the group velocities at 1550 nm and 920 nm are approximately matched, with good optical guidance even at long wavelengths. With low chromatic walk-off, large lengths of this fibre can be used to achieve frequency conversion between two wavelengths several nanometers apart in the GaAs quantum dot emission band. We demonstrate this with up to 78% internal conversion efficiency by pumping with two nearby C-band wavelengths. By cascading this interaction, we also show the generation of a frequency comb. We further demonstrate the potential of this fibre for downconversion between the GaAs dot band and telecoms C-band.

International Conference on Transparent Optical Networks•Jul 14, 2024•0 citations
We report a resource-efficient scheme in which a single pump laser was used to achieve frequency conversion by Bragg-scattering four-wave mixing in a photonic crystal fiber. We demonstrate bidirectional conversion of coherent light between Sr+ P1/2 - D3/2 emission wavelength at 1092 nm and the telecommunication C band with conversion efficiencies of 4.2 % and 37 % for up- and down-conversion, respectively. We discuss how the scheme may be viably scaled to meet the temporal, spectral and polarisation stability requirements of a hybrid light-matter quantum network.
We report a resource-efficient scheme in which a single pump laser was used to achieve frequency conversion by Bragg-scattering four-wave mixing in a photonic crystal fiber. We demonstrate bidirectional conversion of coherent light between S r + 2 P 1 / 2 → 2 D 3 / 2 emission wavelength at 1092 nm and the telecommunication C band with conversion efficiencies of 4.2% and 37% for up- and down-conversion, respectively. We discuss how the scheme may be viably scaled to meet the temporal, spectral, and polarization stability requirements of a hybrid light–matter quantum network.
Trapped ions have achieved the highest fidelity in local processing of quantum information, but their short emission wavelengths are incompatible with long-distance distribution of information at telecom wavelengths, which prevents their use in a large-scale quantum network. We present an interface capable of two-way frequency conversion of single photons between a Sr+{}^{+}+ node-compatible wavelength and the telecom CCC band, forming part of a critical pathway for future hybrid light-matter quantum networks. This scheme offers bidirectional translation of widely separated frequencies in a single stage, with noise levels low enough for high-fidelity interconnects.
In this Letter we demonstrate frequency conversion in the single-photon regime through Bragg-scattering four-wave mixing with near-unit efficiency in a 750 m long commercially available dispersion-engineered highly nonlinear fiber, where all photons and pump laser frequencies are in the low-loss telecommunications band. We achieve 99.1%±4.9% downconversion and 98.0%±5.0% upconversion of photons by 12 nm using a weak coherent state with an average input of 0.27 photons per detection gate window.
Abstract Low-noise frequency conversion of single photons is a critical tool in establishing fibre-based quantum networks. We show that a single photonic crystal fibre can achieve frequency conversion by Bragg-scattering four-wave mixing of source photons from an ultra-broad wavelength range by engineering a symmetric group velocity profile. Furthermore, we discuss how pump tuning can mitigate realistic discrepancies in device fabrication. This enables a single highly adaptable frequency conversion interface to link disparate nodes in a quantum network via the telecoms band.
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.
Future quantum communication networks will rely on the ability to coherently transfer quantum information between different wavelength bands. Coherent frequency conversion in optical fibre by Bragg-scattering fourwave mixing is a promising route to achieving this, but requires fibres with precise dispersion control and broadband transmission at signal, target and pump wavelengths. Here we introduce a photonic crystal fibre with a germania-doped core, for which the group velocities at 1550 nm and 920 nm are approximately matched, with good optical guidance even at long wavelengths. With low chromatic walk-off, large lengths of this fibre can be used to achieve frequency conversion between two wavelengths several nanometers apart in the GaAs quantum dot emission band. We demonstrate this with up to 78% internal conversion efficiency by pumping with two nearby C-band wavelengths. By cascading this interaction, we also show the generation of a frequency comb. We further demonstrate the potential of this fibre for downconversion between the GaAs dot band and telecoms C-band.