Zobrazeno 1 - 10
of 163
pro vyhledávání: '"Th Udem"'
Autor:
R A Probst, L Wang, H-P Doerr, T Steinmetz, T J Kentischer, G Zhao, T W Hänsch, Th Udem, R Holzwarth, W Schmidt
Publikováno v:
New Journal of Physics, Vol 17, Iss 2, p 023048 (2015)
We investigate a new scheme for astronomical spectrograph calibration using the laser frequency comb at the Solar Vacuum Tower Telescope on Tenerife. Our concept is based upon a single-mode fiber channel, that simultaneously feeds the spectrograph wi
Externí odkaz:
https://doaj.org/article/c3bc1da1884d4ef7934f8c139bab0c95
Autor:
Nikolai N. Kolachevsky, Th. Udem, Dylan C. Yost, Tobias P. Lamour, Randolf Pohl, K. Khabarova, Arthur Matveev, Axel Beyer, Lothar Maisenbacher, Alexey Grinin, Theodor W. Haensch
Publikováno v:
AIP Conference Proceedings.
The core of the “proton radius puzzle” is the discrepancy of four standard deviations between the proton root mean square charge radii (rp) determined from regular hydrogen (H), and the muonic hydrogen atom (μp). We have measured the 2S-4P trans
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88d2f64ae3900873d718559d6ae11139
https://doi.org/10.1063/1.5025453
https://doi.org/10.1063/1.5025453
Autor:
Ernst Fill, Alexander Apolonski, Ferenc Krausz, Peter Rußbüldt, Theodor W. Hänsch, Jens Limpert, Dominik Esser, Johannes Weitenberg, Henning Carstens, Jens Rauschenberger, Th. Udem, Andreas Tünnermann, Ioachim Pupeza, Tino Eidam, Simon Holzberger
Publikováno v:
Nature Photonics. 7:608-612
Coherently enhancing laser pulses in a passive cavity provides ideal conditions for high-order harmonic generation in a gas, with repetition rates around 100 MHz (refs 1,2,3). Recently, extreme-ultraviolet radiation with photon energies of up to 30 e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2b7ddad4ef52a4b0686e39ac0cd3f01
https://doi.org/10.1038/nphoton.2013.156
https://doi.org/10.1038/nphoton.2013.156
Autor:
Alexander Apolonski, Th. Udem, Elena Fedulova, Michael K. Trubetskov, Volodymyr Pervak, Oleg Pronin, Jonathan Brons, Ferenc Krausz, Marcus Seidel, Fabian Lücking
Publikováno v:
Nature Communications
Waveform-stabilized laser pulses have revolutionized the exploration of the electronic structure and dynamics of matter by serving as the technological basis for frequency-comb and attosecond spectroscopy. Their primary sources, mode-locked titanium-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bcc5d43a3323c08ca779b15bee71880
http://www.nature.com/ncomms/2015/150505/ncomms7988/full/ncomms7988.html
http://www.nature.com/ncomms/2015/150505/ncomms7988/full/ncomms7988.html
Autor:
Reinhart Poprawe, H.-D. Hoffmann, Ioachim Pupeza, Johannes Weitenberg, Peter Rußbüldt, Th. Udem
Publikováno v:
Journal of Optics
Journal of optics 17(2), 025609 (2015). doi:10.1088/2040-8978/17/2/025609
Journal of optics 17(2), 025609 (2015). doi:10.1088/2040-8978/17/2/025609
Journal of optics 17(2), 025609 (2015). doi:10.1088/2040-8978/17/2/025609
Published by IOP Publ., Bristol
Published by IOP Publ., Bristol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbd07bae93901b01086de7d87b4f0a6f
Autor:
Ferenc Krausz, Andrius Baltuška, Ronald Holzwarth, Th. Udem, Theodor W. Hänsch, Armin Scrinzi, M. Uiberacker, Eleftherios Goulielmakis, Ch. Gohle, Vladislav S. Yakovlev, M. Hentschel
Publikováno v:
Nature. 421:611-615
The amplitude and frequency of laser light can be routinely measured and controlled on a femtosecond (10(-15) s) timescale. However, in pulses comprising just a few wave cycles, the amplitude envelope and carrier frequency are not sufficient to chara
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1a2328681552c9e39256364e8688cb0
https://doi.org/10.1038/nature01414
https://doi.org/10.1038/nature01414
Autor:
Gesine Grosche, Ronald Holzwarth, Harald Schnatz, F. Ozimek, Katharina Predehl, Stefan Droste, Theodor W. Hänsch, Th. Udem
Publikováno v:
2014 IEEE International Frequency Control Symposium (FCS).
We transferred an optical frequency along a 1840km fiber link and achieved an instability of 3x10^-15 at 1s with 4x10^-19 after 100s. The transferred frequency shows no systematic offset within an uncertainty of 3x10^-19. Detailed analysis revealed a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7653893b2eda2fcd929480be1a913f4a
https://doi.org/10.1109/fcs.2014.6859987
https://doi.org/10.1109/fcs.2014.6859987
Autor:
Th. Udem, Harald Schnatz, J. von Zanthier, R. Holzwarth, S. N. Bagayev, A. Yu. Nevsky, F. Riehle, Herbert Walther, Theodor W. Hänsch, P. V. Pokasov, J. Reichert, Mikhail N Skvortsov
Publikováno v:
Optics Communications. 192:263-272
We present a frequency comparison and an absolute frequency measurement of two independent I2-stabilized frequency-doubled Nd:YAG lasers at 532 nm, one set up at the Institute of Laser Physics, No vosibirsk, Russia, the other at the Physikalisch-Tech
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6924295affd858d61b6f5e5faa76888
https://doi.org/10.1016/s0030-4018(01)01190-7
https://doi.org/10.1016/s0030-4018(01)01190-7
Autor:
J. C. Bergquist, Scott A. Diddams, Robert E. Drullinger, Leo W. Hollberg, E. A. Curtis, Wayne M. Itano, K. R. Vogel, W D. Lee, Christopher W. Oates, Th. Udem
Publikováno v:
Physical Review Letters. 86:4996-4999
The frequency comb created by a femtosecond mode-locked laser and a microstructured fiber is used to phase coherently measure the frequencies of both the Hg+ and Ca optical standards with respect to the SI second. We find the transition frequencies t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4b2857b989ad0ad3168166ed36e1e41
https://doi.org/10.1103/physrevlett.86.4996
https://doi.org/10.1103/physrevlett.86.4996
Autor:
Michel Abgrall, M. Niering, Theodor W. Hänsch, André Clairon, Giorgio Santarelli, Christophe Salomon, Ronald Holzwarth, P. Laurent, P. V. Pokasov, Martin Weitz, Pierre Lemonde, Th. Udem, J. Reichert
Publikováno v:
Physical Review Letters. 84:5496-5499
We report on an absolute frequency measurement of the hydrogen $1S\ensuremath{-}2S$ two-photon transition in a cold atomic beam with an accuracy of 1.8 parts in ${10}^{14}$. Our experimental result of 2 466 061 413 187 103(46) Hz has been obtained by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a685d36b1a7ac27eb1842b96502c6c0
https://doi.org/10.1103/physrevlett.84.5496
https://doi.org/10.1103/physrevlett.84.5496