Simultaneous remote transfer of accurate timing and optical frequency over a public fiber network

Abstract

In this work we demonstrate for the first time that it is possible to transfer simultaneously an ultra-stable optical frequency and a precise and accurate timing over 540 km using a public telecommunication optical fiber networks with Internet data. The optical phase is used to carry both the frequency information and the timestamps by modulating a very narrow optical carrier at 1.55 $\mu$m with spread spectrum signals using two-way satellite time transfer modems. The results in term of absolute time accuracy (250 ps) and long-term timing stability (20 ps) well outperform the conventional Global Navigation Satellite System or geostationary transfer methods.

References in corpus (7)

• Progress in Atomic Fountains at LNE-SYRTE
• High-accuracy optical clock based on the octupole transition in 171Yb+
• Suppression of collisional shifts in a strongly interacting lattice clock
• Ultra-stable long distance optical frequency distribution using the Internet fiber network
• Cascaded multiplexed optical link on a telecommunication network for frequency dissemination
• A generalized Ramsey excitation scheme with suppressed light shift
• Distributed cavity phase frequency shifts of the caesium fountain PTB-CSF2

Cited by in corpus (22)

• Optical two-way time and frequency transfer over free space
• Coherent optical frequency transfer at 5e-19 over a doubled 642 km fiber link
• Synchronization of Distant Optical Clocks at the Femtosecond Level
• Brillouin amplification supports $1\times 10^{-20}$ accuracy in optical frequency transfer over 1400~km of underground fibre
• Carrier-phase Two-Way Satellite Frequency Transfer over a Very Long Baseline
• Frequency transfer via a two-way optical phase comparison on a multiplexed fiber network
• Two-Way Optical Frequency Comparisons Over 100km Telecommunication Network Fibers
• Eavesdropping time and frequency: phase noise cancellation along a time-varying path, such as an optical fiber
• Demonstration of quantum synchronization based on second-order quantum coherence of entangled photons
• The unit of time: present and future directions
• Stabilized free-space optical frequency transfer
• Fiber-Optic quantum two-way time transfer with frequency entangled pulses
• Time-Frequency Transfer over Optical Fiber
• Simple Stabilized Radio-Frequency Transfer with Optical Phase Actuation
• Delivering 10 Gb/s optical data with picosecond timing uncertainty over 75 km distance
• Characterization of Optical Frequency Transfer Over 154 km of Aerial Fiber
• Square Kilometer Array Telescope - Precision Reference Frequency Synchronisation via 1f-2f Dissemination
• Frequency drift corrected ultra-stable laser through phase-coherent fiber producing a quantum channel
• A hybrid solution for simultaneous transfer of ultrastable optical frequency, RF frequency and UTC time-tags over optical fiber
• Demonstration of 50 km Fiber-optic two-way quantum time transfer at femtosecond-scale precision
• High-precision Joint Time and Frequency Transfer over a Fiber-optic Telecom Testbed
• Dissemination stability and phase noise specification of fiber-cascaded RF frequency dissemination