In an experiment performed in collaboration with members of the TiFOON consortium, we have set a new record for comparison of distant ultrastable lasers through an optical fibre network.  Our work, published today in Nature Communications, demonstrates how the precision of cutting-edge optical frequency standards in national metrology institutes can be made available through optical… Read More


Software developed within the ROCIT project for real-time evaluation of the blackbody radiation shift has been published as open source on GitHub. The blackbody radiation shift affects atomic clocks and it depends on the ambient temperature seen by the atoms. This software reads the ambient temperature from a multimeter and outputs a plot of the… Read More


Data from the strontium optical lattice clock SYRTE-Sr2 has been included in 3 editions of Circular T (June, July, August) and used for TAI steering. This data had high uptime, and was also submitted with low latency (before the 4th day of the following month), increasing the weight that it could have in the computation.… Read More


The ROCIT consortium held our M30 progress meeting on 18th & 19th October 2021. Despite having to be held virtually, it was a productive meeting including technical discussions on the work carried out and next steps, in particular plans for the international optical clock comparison planned for February / March 2022. The meeting also included… Read More


Tools developed within the ROCIT project for remote laser stabilisation and monitoring have been published on the open source GitHub project.  These include components for monitoring laser wavelengths and for locking lasers to a commerical wavemeter.… Read More


Our collaborators in the TiFOON project are hosting a free two-day workshop Time and Frequency Dissemination over Optical Fibre Networks, examining state of the art and future developments and applications in dissemination of time and frequency over optical fibre networks. More details are available on their website.… Read More


Congratulations to two researchers from ROA (Real Instituto y Observatorio de la Armada), Spain on their successful applications for Researcher Mobility Grants in the 2020 call. José Manuel Suárez Ramírez de Arellano will spend 6 months at NPL researching ARTIQ control systems for optical clocks, while Jesús Romero González will spend 12 months at OBSPARIS… Read More


An engineer working on methods for long-term laser stabilisation within the ROCIT project has contributed software to the open source GitHub project. The stabiliser is a CPU-based dual-channel fast servo (general purpose PID controller) that is suitable for use in commercialising quantum technologies as well as in fundamental physics research.… Read More


The ROCIT consortium held our M18 progress meeting on 2nd and 3rd November 2020. Despite having to be held virtually, it was a productive meeting including technical discussions on the work carried out and next steps, as well as a review of the impact the COVID-19 pandemic has had on progress. Although there have inevitably… Read More