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 (3)

• Progress in Atomic Fountains at LNE-SYRTE
• Cascaded multiplexed optical link on a telecommunication network for frequency dissemination
• A generalized Ramsey excitation scheme with suppressed light shift

Cited by in corpus (9)

• Coherent optical frequency transfer at 5e-19 over a doubled 642 km fiber link
• Carrier-phase Two-Way Satellite Frequency Transfer over a Very Long Baseline
• Two-Way Optical Frequency Comparisons Over 100km Telecommunication Network Fibers
• The unit of time: present and future directions
• Square Kilometer Array Telescope - Precision Reference Frequency Synchronisation via 1f-2f Dissemination
• A hybrid solution for simultaneous transfer of ultrastable optical frequency, RF frequency and UTC time-tags over optical fiber
• High-precision Joint Time and Frequency Transfer over a Fiber-optic Telecom Testbed
• Demonstration of 50 km Fiber-optic two-way quantum time transfer at femtosecond-scale precision
• Dissemination stability and phase noise specification of fiber-cascaded RF frequency dissemination