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


Long-term measurements of the 87Sr optical clock frequency at PTB have provided an improved limit on the coupling of the gravitational potential of the Sun to the proton-to-electron mass ratio μ. The analysis, performed on a series of 42 measurements of the transition frequency over three years from 2017 to 2019, is published in Physical… Read More


ROCIT researcher Anne Curtis from NPL was recently interviewed by science writer Rachel Nuwer for an article on the redefinition of the SI second. The final article, entitled “Inside the incredibly slow race to reinvent time” was published as the cover story in the 19th August edition of New Scientist. and mentions the efforts underway… Read More


William Bowden from NPL recently gave a virtual talk at UMK. Entitled “Strontium optical lattice clocks at NPL”, this covered a recent measurement of the absolute frequency of the Sr clock transition as well as the work being carried out within the ROCIT project to improve the reliability of the system. William also presented recent… Read More


Our second formal collaboration agreement is with the consortium for the EMPIR-funded TiFOON project. The overall objective of that project is to advance fibre-based frequency transfer capabilities in Europe towards a sustainable, universal tool for time and frequency metrology, matching the unprecedented accuracy of modern optical clocks. Of particular interest to the ROCIT consortium is… Read More


We have signed a Letter of Agreement with AIST, NMIJ, who join the ROCIT project as our first collaborator. AIST will collaborate on methods for improving the robustness and automation of optical lattice clocks, as well as joining our international clock comparison campaigns using via GPS-based satellite links.… Read More