Gesine Grosche
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View article: Setup and Characterization of a Fiber Brillouin Amplifier Module for Optical Frequency Transfer Over Interferometric Fiber Links
Setup and Characterization of a Fiber Brillouin Amplifier Module for Optical Frequency Transfer Over Interferometric Fiber Links Open
The details of fiber Brillouin amplifier modules developed for optical frequency dissemination and installed on the fiber link between Braunschweig and Strasbourg for performing optical clock comparisons are described and documented. The p…
View article: Long-distance chronometric leveling with a portable optical clock
Long-distance chronometric leveling with a portable optical clock Open
We have measured the geopotential difference between two locations separated by 457 km by comparison of two optical lattice clocks via an interferometric fiber link, utilizing the gravitational redshift of the clock transition frequency. T…
View article: Long-distance chronometric leveling with a portable optical clock
Long-distance chronometric leveling with a portable optical clock Open
We have measured the geopotential difference between two locations separated by $457~\mathrm{km}$ by comparison of two optical lattice clocks via an interferometric fiber link, utilizing the gravitational redshift of the clock transition f…
View article: Data set from "A free-space interferometer design for optical frequency dissemination and out-of-loop characterization below the 10^{-21}-level"
Data set from "A free-space interferometer design for optical frequency dissemination and out-of-loop characterization below the 10^{-21}-level" Open
The data set contains the data underlying the improved out-of-loop interferometer layout performance evaluation published in Photonics Research (https://doi.org/10.1364/PRJ.485899). The experimental setup and the methodology used is explai…
View article: Data set from "A free-space interferometer design for optical frequency dissemination and out-of-loop characterization below the 10^{-21}-level"
Data set from "A free-space interferometer design for optical frequency dissemination and out-of-loop characterization below the 10^{-21}-level" Open
The data set contains the data underlying the improved out-of-loop interferometer layout performance evaluation published in Photonics Research (https://doi.org/10.1364/PRJ.485899). The experimental setup and the methodology used is explai…
View article: Data for "Comparing ultrastable lasers at 7×10-17 fractional frequency instability through a 2220 km optical fibre network"
Data for "Comparing ultrastable lasers at 7×10-17 fractional frequency instability through a 2220 km optical fibre network" Open
Here we share the relevant data of the manuscript “Comparing ultrastable lasers at 7×10-17 fractional frequency instability through a 2,220 km optical fibre network”. Raw data was acquired using multiple synchronised, dead-time free freque…
View article: Data for "Comparing ultrastable lasers at 7×10-17 fractional frequency instability through a 2220 km optical fibre network"
Data for "Comparing ultrastable lasers at 7×10-17 fractional frequency instability through a 2220 km optical fibre network" Open
Here we share the relevant data of the manuscript “Comparing ultrastable lasers at 7×10-17 fractional frequency instability through a 2,220 km optical fibre network”. Raw data was acquired using multiple synchronised, dead-time free freque…
View article: Validating frequency transfer via interferometric fiber links for optical clock comparisons
Validating frequency transfer via interferometric fiber links for optical clock comparisons Open
We investigate the validation of fiber-based optical frequency transfer for frequency comparison applications. We specifically consider the frequency transfer validation for remote optical clock comparisons and want to ensure interferometr…
View article: Data set from "Combining fiber Brillouin amplification with a repeater laser station for fiber-based optical frequency dissemination over 1400 km"
Data set from "Combining fiber Brillouin amplification with a repeater laser station for fiber-based optical frequency dissemination over 1400 km" Open
The data set contains the data underlying the fiber link performance evaluation published in Koke et al 2019 New J. Phys. 21 123017 (https://doi.org/10.1088/1367-2630/ab5d95). The experimental setup and the methodology used is explained in…
View article: Data set from "Combining fiber Brillouin amplification with a repeater laser station for fiber-based optical frequency dissemination over 1400 km"
Data set from "Combining fiber Brillouin amplification with a repeater laser station for fiber-based optical frequency dissemination over 1400 km" Open
The data set contains the data underlying the fiber link performance evaluation published in Koke et al 2019 New J. Phys. 21 123017 (https://doi.org/10.1088/1367-2630/ab5d95). The experimental setup and the methodology used is explained in…
View article: Search for transient variations of the fine structure constant and dark matter using fiber-linked optical atomic clocks
Search for transient variations of the fine structure constant and dark matter using fiber-linked optical atomic clocks Open
We search for transient variations of the fine structure constant using data from a European network of fiber-linked optical atomic clocks. By searching for coherent variations in the recorded clock frequency comparisons across the network…
View article: Combining fiber Brillouin amplification with a repeater laser station for fiber-based optical frequency dissemination over 1400 km
Combining fiber Brillouin amplification with a repeater laser station for fiber-based optical frequency dissemination over 1400 km Open
We investigate optical frequency dissemination over a 1400 km long fiber link in looped configuration over a pair of underground fibers between Braunschweig and Strasbourg. This fiber link is the first to combine fiber Brillouin amplifiers…
View article: CLONETS – Clock Network Services : Optical-fibre network for clock services in Europe: recent progress
CLONETS – Clock Network Services : Optical-fibre network for clock services in Europe: recent progress Open
Dynamic development of long-distance methods of time and frequency signals transmission over optical fibers is giving the opportunity to create optical network with dedicated clock services. In order to prepare the deployment of this techn…
View article: Atomic clocks for geodesy
Atomic clocks for geodesy Open
We review experimental progress on optical atomic clocks and frequency transfer, and consider the prospects of using these technologies for geodetic measurements. Today, optical atomic frequency standards have reached relative frequency in…
View article: The H2020 European project CLONETS: Clock services over optical-fibre networks in Europe
The H2020 European project CLONETS: Clock services over optical-fibre networks in Europe Open
The H2020 project CLONETS (www.clonets.eu) is a coordination and support action started in January 2017, and it aims at accelerating the take-up of optical fibre link technology by industry, research and society. One of the main targets is…
View article: CLONETS - clock network services: Strategy and innovation for clock services over optical-fibre networks
CLONETS - clock network services: Strategy and innovation for clock services over optical-fibre networks Open
Methods for long-distance time and frequency transfer over optical fibres have demonstrated excellent performances and are evolving rapidly. CLONETS is a new European Union-funded coordination and support action intended to accelerate the …
View article: CLONETS – Clock network services strategy and innovation for clock services over optical-fibre networks
CLONETS – Clock network services strategy and innovation for clock services over optical-fibre networks Open
Methods for long-distance time and frequency transfer over optical fibres have demonstrated excellent performances and are evolving rapidly. CLONETS is a new European Union-funded coordination and support action intended to accelerate the …
View article: Test of Special Relativity Using a Fiber Network of Optical Clocks
Test of Special Relativity Using a Fiber Network of Optical Clocks Open
Phase compensated optical fiber links enable high accuracy atomic clocks separated by thousands of kilometers to be compared with unprecedented statistical resolution. By searching for a daily variation of the frequency difference between …
View article: First international comparison of fountain primary frequency standards via a long distance optical fiber link
First international comparison of fountain primary frequency standards via a long distance optical fiber link Open
We report on the first comparison of distant caesium fountain primary frequency standards (PFSs) via an optical fiber link. The 1415 km long optical link connects two PFSs at LNE-SYRTE (Laboratoire National de métrologie et d'Essais—SYstèm…