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Data for manuscript entitled "Quantum-limited optical time transfer for future geosynchronous links"

Metadata Updated: May 9, 2023

Data for the figures in the manuscript entitled "Quantum-limited optical time transfer for future geosynchronous links" first published as a preprint at Abstract: The combination of optical time transfer and optical clocks opens up the possibility of large-scale free-space networks that connect both ground-based optical clocks and future space-based optical clocks. Such networks promise better tests of general relativity, dark matter searches, and gravitational wave detection. The ability to connect optical clocks to a distant satellite could enable space-based very long baseline interferometry (VLBI), advanced satellite navigation, clock-based geodesy, and thousand-fold improvements in intercontinental time dissemination. Thus far, only optical clocks have pushed towards quantum-limited performance. In contrast, optical time transfer has not operated at the analogous quantum limit set by the number of received photons. Here, we demonstrate time transfer with near quantum-limited acquisition and timing at 10,000 times lower received power than previous approaches. Over 300 km between mountaintops in Hawaii with launched powers as low as 40 μW, distant timescales are synchronized to 320 attoseconds. This nearly quantum-limited operation is critical for long-distance free-space links where photons are few and amplification costly -- at 4.0 mW transmit power, this approach can support 102 dB link loss, more than sufficient for future time transfer to geosynchronous orbits.Fig2a: Low power acquisition with a time programmable frequency combFig2b: Timing noise versus received powerFig2c: Time deviations for various received powersFig3: Time deviations and modified Allan deviationsFig4: Power spectral densities and excess noise as a function of turbulence Fig5: Multi-parameter comparison of time transfer methods

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Metadata Created Date May 9, 2023
Metadata Updated Date May 9, 2023
Data Update Frequency irregular

Metadata Source

Harvested from NIST

Additional Metadata

Resource Type Dataset
Metadata Created Date May 9, 2023
Metadata Updated Date May 9, 2023
Publisher National Institute of Standards and Technology
Identifier ark:/88434/mds2-2967
Data First Published 2023-04-07
Language en
Data Last Modified 2023-03-22 00:00:00
Category Physics:Optical physics, Metrology:Time and frequency metrology, Physics:Time and frequency
Public Access Level public
Data Update Frequency irregular
Bureau Code 006:55
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id 2cf8d074-85eb-41f0-8db7-78210c0bb9b6
Harvest Source Id 74e175d9-66b3-4323-ac98-e2a90eeb93c0
Harvest Source Title NIST
Homepage URL
Program Code 006:045
Related Documents
Source Datajson Identifier True
Source Hash ea315c5eb90d11bf254679dd20b23e298c22822d
Source Schema Version 1.1

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