| Optical frequency metrology T Udem, R Holzwarth, TW Hänsch Nature 416 (6877), 233-237, 2002 | 3933 | 2002 |
| Attosecond control of electronic processes by intense light fields A Baltuška, T Udem, M Uiberacker, M Hentschel, E Goulielmakis, C Gohle, ... Nature 421 (6923), 611-615, 2003 | 2198 | 2003 |
| Optical frequency synthesizer for precision spectroscopy R Holzwarth, T Udem, TW Hänsch, JC Knight, WJ Wadsworth, ... Physical review letters 85 (11), 2264, 2000 | 1740 | 2000 |
| Direct link between microwave and optical frequencies with a 300 THz femtosecond laser comb SA Diddams, DJ Jones, J Ye, ST Cundiff, JL Hall, JK Ranka, RS Windeler, ... Physical review letters 84 (22), 5102, 2000 | 1684 | 2000 |
| Absolute Optical Frequency Measurement of the Cesium Line with a Mode-Locked Laser T Udem, J Reichert, R Holzwarth, TW Hänsch Physical review letters 82 (18), 3568, 1999 | 1175 | 1999 |
| An optical clock based on a single trapped 199Hg+ ion SA Diddams, T Udem, JC Bergquist, EA Curtis, RE Drullinger, L Hollberg, ... Science 293 (5531), 825-828, 2001 | 1089 | 2001 |
| Measurement of the Hydrogen - Transition Frequency by Phase Coherent Comparison with a Microwave Cesium Fountain Clock M Niering, R Holzwarth, J Reichert, P Pokasov, T Udem, M Weitz, ... Physical Review Letters 84 (24), 5496, 2000 | 895 | 2000 |
| Laser frequency combs for astronomical observations T Steinmetz, T Wilken, C Araujo-Hauck, R Holzwarth, TW Hansch, ... Science 321 (5894), 1335-1337, 2008 | 838 | 2008 |
| A frequency comb in the extreme ultraviolet C Gohle, T Udem, M Herrmann, J Rauschenberger, R Holzwarth, ... Nature 436 (7048), 234-237, 2005 | 758 | 2005 |
| Controlling the phase evolution of few-cycle light pulses A Apolonski, A Poppe, G Tempea, C Spielmann, T Udem, R Holzwarth, ... Physical Review Letters 85 (4), 740, 2000 | 694 | 2000 |
| Measuring the frequency of light with mode-locked lasers J Reichert, R Holzwarth, T Udem, TW Hänsch Optics communications 172 (1-6), 59-68, 1999 | 687 | 1999 |
| Accurate measurement of large optical frequency differences with a mode-locked laser T Udem, J Reichert, R Holzwarth, TW Hänsch Optics letters 24 (13), 881-883, 1999 | 670 | 1999 |
| Cavity-enhanced dual-comb spectroscopy B Bernhardt, A Ozawa, P Jacquet, M Jacquey, Y Kobayashi, T Udem, ... Nature photonics 4 (1), 55-57, 2010 | 660 | 2010 |
| New limits on the drift of fundamental constants from laboratory measurements M Fischer, N Kolachevsky, M Zimmermann, R Holzwarth, T Udem, ... Physical Review Letters 92 (23), 230802, 2004 | 660 | 2004 |
| A 920-kilometer optical fiber link for frequency metrology at the 19th decimal place K Predehl, G Grosche, SMF Raupach, S Droste, O Terra, J Alnis, T Legero, ... Science 336 (6080), 441-444, 2012 | 638 | 2012 |
| Phase-Coherent Measurement of the Hydrogen Transition Frequency with an Optical Frequency Interval Divider Chain T Udem, A Huber, B Gross, J Reichert, M Prevedelli, M Weitz, TW Hänsch Physical review letters 79 (14), 2646, 1997 | 638 | 1997 |
| Improved Measurement of the Hydrogen Transition Frequency CG Parthey, A Matveev, J Alnis, B Bernhardt, A Beyer, R Holzwarth, ... Physical review letters 107 (20), 203001, 2011 | 578 | 2011 |
| Optical frequency combs: Coherently uniting the electromagnetic spectrum SA Diddams, K Vahala, T Udem Science 369 (6501), eaay3676, 2020 | 512 | 2020 |
| The Rydberg constant and proton size from atomic hydrogen A Beyer, L Maisenbacher, A Matveev, R Pohl, K Khabarova, A Grinin, ... Science 358 (6359), 79-85, 2017 | 484 | 2017 |
| High-precision wavelength calibration of astronomical spectrographs with laser frequency combs MT Murphy, T Udem, R Holzwarth, A Sizmann, L Pasquini, ... Monthly Notices of the Royal Astronomical Society 380 (2), 839-847, 2007 | 472 | 2007 |
Theodor HaenschMax-Planck Institute of Quantum Optics; Ludwig-Maximilians UniversityVerified email at mpq.mpg.de