New record for comparison of distant ultrastable lasers | NPL News

Led by NPL, an international consortium has set a new record for comparing distant ultrastable lasers through a metrological optical fibre network.

Schematic layout of the experiment for comparing two ultrastable lasers through a 2220 km long metrological optical fiber link network.

Using cutting-edge optical frequency standards developed at PTB and NPL, the team has been able to demonstrate that their measurement precision is preserved even when transmitted across thousands of kilometers of optical fibre.

Source: New record for comparison of distant ultrastable lasers – NPL