2022/12/05 by Giuseppe Marra, Marra, Giuseppe, Paul Gaynor +19
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Advanced Frequency and Time Standards #FOS: Physical sciences #Geophysics and Sensor Technology #Instrumentation and Detectors (physics.ins-det) #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.2212.11150
openalex publication_date 2022/12/05 · openalex created_date 2023/01/04 · openalex updated_date 2026/07/28
Optical clock comparison via optical fibre links has been achieved over continental scales, but has not yet been demonstrated intercontinentally. The transfer of ultra-stable optical frequencies over transoceanic distances is a challenging task, as the seafloor cable architecture prevents the use of environmental noise suppression techniques currently employed on land-based metrological links. As a fundamental first step towards devising suitable frequency transfer techniques to enable future clock comparison on a global scale, here we show the free-running frequency stability and phase noise measurements of a transatlantic seafloor optical link between the UK and Canada. To the best of our knowledge, these are the first ever measurements of an intercontinental optical fibre link.