Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Sebastian Häfner"'
Autor:
Jialiang Yu, Sebastian Häfner, Thomas Legero, Sofia Herbers, Daniele Nicolodi, Chun Yu Ma, Fritz Riehle, Uwe Sterr, Dhruv Kedar, John M. Robinson, Eric Oelker, Jun Ye
Publikováno v:
Physical Review X, Vol 13, Iss 4, p 041002 (2023)
Thermodynamically induced length fluctuations of high-reflectivity mirror coatings put a fundamental limit on sensitivity and stability of precision optical interferometers like gravitational-wave detectors and ultrastable lasers. The main contributi
Externí odkaz:
https://doaj.org/article/13d900125e514b71ac2ed52c83c3bb98
Autor:
Andreas Grimmer, Philipp Frank, Philipp Ebner, Sebastian Häfner, Andreas Richter, Robert Wille
Publikováno v:
Micromachines, Vol 9, Iss 12, p 625 (2018)
Microfluidics continues to bring innovation to the life sciences. It stimulates progress by enabling new ways of research in biology, chemistry, and biotechnology. However, when designing a microfluidic device, designers have to conduct many tasks by
Externí odkaz:
https://doaj.org/article/627320eb51054816b9ac8ac05af82aea
Autor:
Stephan Falke, Nathan Lemke, Christian Grebing, Burghard Lipphardt, Stefan Weyers, Vladislav Gerginov, Nils Huntemann, Christian Hagemann, Ali Al-Masoudi, Sebastian Häfner, Stefan Vogt, Uwe Sterr, Christian Lisdat
Publikováno v:
New Journal of Physics, Vol 16, Iss 7, p 073023 (2014)
We have measured the absolute frequency of the optical lattice clock based on ^87 Sr at PTB with an uncertainty of $3.9\times {{10}^{-16}}$ using two caesium fountain clocks. This is close to the accuracy of todayʼs best realizations of the SI secon
Externí odkaz:
https://doaj.org/article/ae9588aabb2c45838a6917f6fd5c51ea
Autor:
Sofia, Herbers, Sebastian, Häfner, Sören, Dörscher, Tim, Lücke, Uwe, Sterr, Christian, Lisdat
Publikováno v:
Optics letters. 47(20)
We present a transportable ultra-stable clock laser system based on a Fabry-Perot cavity with crystalline Al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::1590723d83e4b6dad3771e0358ab9c92
https://pubmed.ncbi.nlm.nih.gov/36240384
https://pubmed.ncbi.nlm.nih.gov/36240384
Autor:
John M, Robinson, Eric, Oelker, William R, Milner, Dhruv, Kedar, Wei, Zhang, Thomas, Legero, Dan G, Matei, Sebastian, Häfner, Fritz, Riehle, Uwe, Sterr, Jun, Ye
Publikováno v:
Optics letters. 46(3)
Mechanical loss of dielectric mirror coatings sets fundamental limits for both gravitational wave detectors and cavity-stabilized optical local oscillators for atomic clocks. Two approaches are used to determine the mechanical loss: ringdown measurem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::01c3540852f1a14622f9712cc8b3cafc
https://pubmed.ncbi.nlm.nih.gov/33528416
https://pubmed.ncbi.nlm.nih.gov/33528416
Publikováno v:
Optics express. 28(11)
We present an interrogation laser system for a transportable strontium lattice clock operating at 698 nm, which is based on an ultra-low-expansion glass reference cavity. Transportability is achieved by implementing a rigid, compact, and vibration in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::a673e72418d5b70fee67d1d5fbf98ab7
https://pubmed.ncbi.nlm.nih.gov/32549464
https://pubmed.ncbi.nlm.nih.gov/32549464
Autor:
Helen S. Margolis, Heiner Denker, Christian Voigt, Ludger Timmen, Jacopo Grotti, Silvio Koller, Stefan Vogt, Sebastian Häfner, Uwe Sterr, Christian Lisdat, Antoine Rolland, Fred N. Baynes, Michel Zampaolo, Pierre Thoumany, Marco Pizzocaro, Benjamin Rauf, Filippo Bregolin, Anna Tampellini, Piero Barbieri, Massimo Zucco, Giovanni A. Costanzo, Cecilia Clivati, Filippo Levi, Davide Calonico
Publikováno v:
Proceedings
We discuss the relation between atomic clocks and gravity from two perspectives: gravity potential measurements for optical clock comparisons and contributions to international timescales and, conversely, the measurement of gravity potential differen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b85b25172dc9deff30c1ce9e4bdefcf
https://doi.org/10.1364/cleo_si.2019.sm1f.3
https://doi.org/10.1364/cleo_si.2019.sm1f.3
Autor:
Thomas Legero, John Robinson, Jun Ye, Wei Zhang, William R. Milner, D. G. Matei, Fritz Riehle, Sebastian Häfner, Eric Oelker, Dhruv Kedar, Uwe Sterr
Publikováno v:
Optics Letters. 46:592
Mechanical loss of dielectric mirror coatings sets fundamental limits for both gravitational wave detectors and cavity-stabilized optical local oscillators for atomic clocks. Two approaches are used to determine the mechanical loss: ringdown measurem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::119010fd99a3352e127be3e9071932d5
https://doi.org/10.1364/ol.413758
https://doi.org/10.1364/ol.413758
Publikováno v:
Optics Express. 28:16407
We present an interrogation laser system for a transportable strontium lattice clock operating at 698 nm, which is based on an ultra-low-expansion glass reference cavity. Transportability is achieved by implementing a rigid, compact, and vibration in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::963ca45a3e77ccaa9d94993cded4970f
https://doi.org/10.1364/oe.390105
https://doi.org/10.1364/oe.390105
Autor:
Yeshpal Singh, Sebastian Häfner, S. Dörscher, Kai Bongs, Ch. Lisdat, Uwe Sterr, Stephan Schiller, S. Origlia, Roman Schwarz, Sofia Herbers, M. S. Pramod, A. Al-Masoudi
Publikováno v:
Physical Review A. 98
Optical clocks operated on satellites are expected to open up new opportunities in time transfer, geodesy, fundamental physics, and satellite navigation. Here we demonstrate an important first step towards this goal: a modular, compact, optical latti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3949c5b2614563a1ff88d9c31f5fdc58
https://doi.org/10.1103/physreva.98.053443
https://doi.org/10.1103/physreva.98.053443