Two-Branch Fiber Link for International Clock Networks

Abstract

We present our work on realizing two-branch fiber links enabling multiple-partner clock comparisons in Europe. We report in detail on the setup connecting two long haul links, and report for the relative frequency stability and accuracy. We report on a combined uptime of 90% for our dual-branch link during almost one month. We finally discuss the combined uncertainty contribution of the ensemble of the link architecture to a clock comparison. We show that the frequency transfer uncertainty is 2 x 10 --19 .

References in corpus (11)

• A clock network for geodesy and fundamental science
• Experimenting an optical second with strontium lattice clocks
• Searching for an oscillating massive scalar field as a dark matter candidate using atomic hyperfine frequency comparisons
• Test of special relativity using a fiber network of optical clocks
• Cascaded multiplexed optical link on a telecommunication network for frequency dissemination
• An ultrastable silicon cavity in a continuously operating closed-cycle cryostat at 4 K
• Cascaded optical fiber link using the Internet network for remote clocks comparison
• First international comparison of fountain primary frequency standards via a long distance optical fiber link
• Tackling the Limits of Optical Fiber Links
• Studying fundamental limit of optical fiber links to $10^{-21}$ level
• Ultra-stable optical frequency dissemination on a multi-access fibre network

Cited by in corpus (1)

• Combining fiber Brillouin amplification with a repeater laser station for fiber-based optical frequency dissemination over 1400 km