462 citations · 1k across the 11 of their papers we have counts for
11 papers
Photon-number dependent afterpulsing in superconducting nanostrip single-photon detectors
Sebastian M. F. Raupach, Mariia Sidorova, Alexej D. Semenov
Superconducting nanostrip single-photon detectors (SNSPD) are wide-spread tools in photonic quantum technologies. Here, we study afterpulsing in commercial SNSPD made of amorphous…
Unexpected detection rate dependence of the intrinsic detection efficiency in single-photon detectors based on avalanche diodes
Sebastian M. F. Raupach, Ivo Pietro Degiovanni, Hristina Georgieva +6
Single-photon detectors are a pivotal component in photonic quantum technologies. A precise and comprehensive calibration of the intrinsic detection efficiency is of utmost importa…
Detection of ultra-weak laser pulses by free-running single-photon detectors: modeling dead time and dark counts effects
Hristina Georgieva, Alice Meda, Sebastian M. F. Raupach +6
In quantum communication systems, the precise estimation of the detector's response to the incoming light is necessary to avoid security breaches. The typical working regime uses a…
Combining fiber Brillouin amplification with a repeater laser station for fiber-based optical frequency dissemination over 1400 km
Sebastian Koke, Alexander Kuhl, Thomas Waterholter +7
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 fi…
First international comparison of fountain primary frequency standards via a long distance optical fiber link
J. Guéna, S. Weyers, M. Abgrall +25
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-S…
Test of special relativity using a fiber network of optical clocks
P. Delva, J. Lodewyck, S. Bilicki +28
Phase compensated optical fiber links enable high accuracy atomic clocks separated by thousands of kilometers to be compared with unprecedented statistical resolution. By searching…
A clock network for geodesy and fundamental science
C. Lisdat, G. Grosche, N. Quintin +32
Leveraging the unrivaled performance of optical clocks in applications in fundamental physics beyond the standard model, in geo-sciences, and in astronomy requires comparing the fr…
Characterization of a 450-km Baseline GPS Carrier-Phase Link using an Optical Fiber Link
Stefan Droste, Christian Grebing, Julia Leute +6
A GPS carrier-phase frequency transfer link along a baseline of 450 km has been established and is characterized by comparing it to a phase-stabilized optical fiber link of 920 km…
Brillouin amplification supports accuracy in optical frequency transfer over 1400~km of underground fibre
Sebastian M. F. Raupach, Andreas Koczwara, Gesine Grosche
We investigate optical frequency transfer over a 1400~km loop of underground fibre connecting Braunschweig and Strasbourg. Largely autonomous fibre Brillouin amplifiers (FBA) are t…
Optical frequency transfer via a 660 km underground fiber link using a remote Brillouin amplifier
S. M. F. Raupach, A. Koczwara, G. Grosche
In long-haul optical continuous-wave frequency transfer via fiber, remote bidirectional Er-doped fiber amplifiers are commonly used to mitigate signal attenuation. We demonstra…
Chirped Frequency Transfer with an accuracy of and its Application to the Remote Synchronisation of Timescales
S. M. F. Raupach, G. Grosche
We demonstrate combined high-fidelity long-haul transfer of a linearly chirped, optical frequency and time transfer. In a proof-of-principle experiment we transfer an optical frequ…