Reciprocity of propagation in optical fiber links demonstrated to 10−21

Ensemble samplers with affine invariance

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Optical atomic clocks

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Optical Clocks and Relativity

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Single-Ion Atomic Clock with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mn>3</mml:mn> <mml:mo>×</mml:mo> <mml:msup> <mml:mrow> <mml:mn>10</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>18</mml:mn> </mml:mrow> </mml:msup> </mml:math> Systematic Uncertainty

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Sr Lattice Clock at 1 × 10 –16 Fractional Uncertainty by Remote Optical Evaluation with a Ca Clock

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A clock network for geodesy and fundamental science

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Gravitational wave detection with optical lattice atomic clocks

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High-stability transfer of an optical frequency over long fiber-optic links

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Ultrastable optical clock with two cold-atom ensembles

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A Fermi-degenerate three-dimensional optical lattice clock

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Can Dark Matter Induce Cosmological Evolution of the Fundamental Constants of Nature?

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Geopotential measurements with synchronously linked optical lattice clocks

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Searching for an Oscillating Massive Scalar Field as a Dark Matter Candidate Using Atomic Hyperfine Frequency Comparisons

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Test of Special Relativity Using a Fiber Network of Optical Clocks

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Frequency ratio of Yb and Sr clocks with 5 × 10−17 uncertainty at 150 seconds averaging time

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Imaging Optical Frequencies with 100 μHz Precision and 1.1 μm Resolution

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Towards an optical clock for space: Compact, high-performance optical lattice clock based on bosonic atoms

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Direct Comparison of Distant Optical Lattice Clocks at the $10^{-16}$ Uncertainty

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Brillouin amplification supports<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>1</mml:mn><mml:mo>×</mml:mo><mml:msup><mml:mn>10</mml:mn><mml:mrow><mml:mo>−</mml:mo><mml:mn>20</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>uncertainty in optical frequency transfer over 1400 km of underground fiber

Raupach, S. M. F., Koczwara, A., & Grosche, G. (2015) · Physical Review A · doi:10.1103/physreva.92.021801 · Cited by 101 · see citing works

Geodetic methods to determine the relativistic redshift at the level of 10 $$^{-18}$$ - 18 in the context of international timescales: a review and practical results

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Two Clock Transitions in Neutral Yb for the Highest Sensitivity to Variations of the Fine-Structure Constant

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Frequency transfer via a two-way optical phase comparison on a multiplexed fiber network

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Untitled work

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Determination of a high spatial resolution geopotential model using atomic clock comparisons

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Tackling the limits of optical fiber links

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First industrial-grade coherent fiber link for optical frequency standard dissemination

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Frequency transfer via a two-way optical phase comparison on a multiplexed fiber network

Calosso, C. E., Bertacco, E. K., Calonico, D., Clivati, C., Costanzo, G. A., Frittelli, M., Levi, F., Mura, A., & Godone, A. (2014) · PORTO Publications Open Repository TOrino (Politecnico di Torino) · Cited by 53 · see citing works

Relativistic corrections for time and frequency transfer in optical fibres

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Hybrid fiber links for accurate optical frequency comparison

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Ultra-broadband dual-branch optical frequency comb with 10 −18 instability

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Studying the fundamental limit of optical fiber links to the 10⁻²¹ level

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Multi-branch fiber comb with relative frequency uncertainty at 10−20using fiber noise difference cancellation

Kashiwagi, K., Nakajima, Y., Wada, M., Okubo, S., & Inaba, H. (2018) · Optics Express · doi:10.1364/oe.26.008831 · Cited by 24 · see citing works

An Efficient and Configurable Preprocessing Algorithm to Improve Stability Analysis

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Two-Branch Fiber Link for International Clock Networks

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An accurate and robust metrological network for coherent optical frequency dissemination

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GENESIS: co-location of geodetic techniques in space

Delva, P., Altamimi, Z., Blazquez, A., Bloßfeld, M., Böhm, J., Bonnefond, P., Boy, J., Bruinsma, S., Bury, G., Chatzinikos, M., et al. (2023) · Earth Planets and Space · doi:10.1186/s40623-022-01752-w · Cited by 53 · see citing works

Testing gravity with cold-atom clocks in space

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Coherent fibre link for synchronization of delocalized atomic clocks

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Non-reciprocity in optical fiber links: experimental evidence

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Branching Optical Frequency Transfer With Enhanced Post Automatic Phase Noise Cancellation

Xue, R., Hu, L., Shen, J., Chen, J., & Wu, G. (2021) · Journal of Lightwave Technology · doi:10.1109/jlt.2021.3076182 · Cited by 18 · see citing works

Free-Space Point-to-Multiplepoint Optical Frequency Transfer With Lens Assisted Integrated Beam Steering

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Near- to mid-IR spectral purity transfer with a tunable frequency comb: Methanol frequency metrology over a 1.4 GHz span

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Polarization Scramblers to Solve Practical Limitations of Frequency Transfer

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Free-space interferometer design for optical frequency dissemination and out-of-loop characterization below the 10 −21 -level

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Temperature-Induced Noise-Insensitive Laser Repeater Station for Optical Frequency Transfer

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Performance Evaluation and Requirement Analysis for Chronometric Leveling with High-Accuracy Optical Clocks

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Purification technique with a hertz-linewidth laser for fiber-based optical frequency coherence dissemination

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Understanding and exploiting metrological fiber networks for Sagnac sensing, frequency dissemination and geosensing

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How Accurately Can an Optical Clock Network Estimate Absolute Gravity Potential When Combined with Global Geopotential Models?

Chatzinikos, M., & Delva, P. (2026) · International Association of Geodesy symposia · doi:10.1007/1345_2026_308

OPTIS-Improved Tests of Special and General Relativity

Dittus, H., Lämmerzahl, C., Scheithauer, S., Schiller, S., Peters, A., Samain, É., Ciufolini, I., & Iorio, L. (2005)

Optical tests of general relativity

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On the close connection between gravitational radiation and the optical and radar tests of general relativity

Westervelt, P. J. (1977) · General Relativity and Gravitation

OPTIS – HIGH PRECISION TEST OF SPECIAL AND GENERAL RELATIVITY IN SPACE

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NEW OPTICAL TESTS OF SPECIAL RELATIVITY

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