Tunable frequency conversion in doped photonic crystal fiber pumped near degeneracy

Murphy, Leah R., Olszewski, Mateusz J., Androvitsaneas, Petros ORCID: https://orcid.org/0000-0001-5013-0282, Alvarez Perez, Miguel, Smith, William A. M., Bennett, Anthony J. ORCID: https://orcid.org/0000-0002-5386-3710, Mosley, Peter J. and Davis, Alex O. C. 2024. Tunable frequency conversion in doped photonic crystal fiber pumped near degeneracy. Optica 11 (11) , pp. 1490-1496. 10.1364/OPTICA.537442

Preview

PDF - Published Version Available under License Creative Commons Attribution. Download (1MB) | Preview

Abstract

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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Optical Society of America
ISSN:	2334-2536
Date of First Compliant Deposit:	1 November 2024
Date of Acceptance:	9 October 2024
Last Modified:	08 Jan 2025 22:20
URI:	https://orca.cardiff.ac.uk/id/eprint/173466

Actions (repository staff only)

Edit Item