DescriptionSolid-core silica fibre makes up our current optical-fibre network infrastructure. Creating a quantum communications network has been to traditionally utilise existing optical-fibre network infrastructure and isolate the quantum channel through wavelength-division techniques, which has performance limitations due to Raman noise. As new optical-fibre technologies emerge from research labs (for example few-mode fibres, multi-spatial-mode fibres, and hollow-core fibres), teams are exploring how they could be used to better integrate quantum communications into a fibre network. Nested Antiresonant Nodeless Fibers (NANFs) are a new generation of optical fibre technology, where the resonances that create the waveguiding properties can be tuned for a given application, including low loss windows over a broad spectral range. Here, we present the demonstration of a NANF as a transmission channel for three different wavelengths: a pseudo-quantum single-photon level signal at 850 nm and two co-propagating conventional signals at wavelengths 940 nm and 1550 nm. We show the impact of the two co-propagating conventional wavelengths on the single-photon level signal. By utilizing this new type of NANF and relatively inexpensive Si-SPAD technology, there could be a reduction in the cost of deploying short-range QKD networking, enabling more uptake of the technology.
|Period||1 Sept 2022|
|Event title||Photon 2022|
|Degree of Recognition||International|