Investigations towards transmitting time and QKD signals over the same optical fibre
17:00 - 17:20
Christopher Chunnilall, Elizabeth Laier-English, Anthony Vaquero-Stainer and Adrian Wonfor NPL is developing single-photon metrology of the quantum-optical layer in QKD hardware. NPL uses fibre links to provide a time signal traceable to UTC to the finance sector, and to enable remote frequency comparison between optical clocks. These applications normally use signal powers around 0 dBm (1 mW).
NPL and the UK Quantum Communications Hub are investigating the ability to operate QKD over fibres carrying time signals. Initial investigations are being performed on spools of fibre, with the aim of implementation over installed fibre links. We report on progress towards our objective, and characterisation of the link and hardware parameters."
