U. Keller

41.6k total citations · 7 hit papers
753 papers, 29.5k citations indexed

About

U. Keller is a scholar working on Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering and Spectroscopy. According to data from OpenAlex, U. Keller has authored 753 papers receiving a total of 29.5k indexed citations (citations by other indexed papers that have themselves been cited), including 716 papers in Atomic and Molecular Physics, and Optics, 585 papers in Electrical and Electronic Engineering and 66 papers in Spectroscopy. Recurrent topics in U. Keller's work include Advanced Fiber Laser Technologies (598 papers), Laser-Matter Interactions and Applications (371 papers) and Solid State Laser Technologies (357 papers). U. Keller is often cited by papers focused on Advanced Fiber Laser Technologies (598 papers), Laser-Matter Interactions and Applications (371 papers) and Solid State Laser Technologies (357 papers). U. Keller collaborates with scholars based in Switzerland, Germany and United States. U. Keller's co-authors include L. Gallmann, Thomas Südmeyer, R. Paschotta, N. Matuschek, M. Moser, M. Golling, K. J. Weingarten, Claudio Cirelli, Clemens Hönninger and Franz X. Kärtner and has published in prestigious journals such as Nature, Science and Proceedings of the National Academy of Sciences.

In The Last Decade

U. Keller

701 papers receiving 27.4k citations

Hit Papers

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What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Recent developments in compact ultrafast lasers

2003 1.7k citations U. Keller profile →
Semiconductor saturable absorber mirrors (SESAM's) for femtosecond to nanosecond pulse generation in solid-state lasers

1996 1.4k citations U. Keller, K. J. Weingarten et al. profile →
Q-switching stability limits of continuous-wave passive mode locking

1999 638 citations U. Keller et al. profile →
Attosecond Ionization and Tunneling Delay Time Measurements in Helium

2008 594 citations U. Keller et al. profile →
Carrier-envelope offset phase control: A novel concept for absolute optical frequency measurement and ultrashort pulse generation

1999 551 citations U. Keller et al. profile →
Solid-state low-loss intracavity saturable absorber for Nd:YLF lasers: an antiresonant semiconductor Fabry–Perot saturable absorber

1992 500 citations U. Keller et al. Optics Letters profile →
Generation of intense, carrier-envelope phase-locked few-cycle laser pulses through filamentation

2004 466 citations U. Keller et al. profile →

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author						Papers	Cites
U. Keller	27.5k	20.0k	3.2k	2.0k	1.6k	753	29.5k
S. De Silvestri	10.5k 0.4×	5.5k 0.3×	1.9k 0.6×	2.0k 1.0×	1.5k 0.9×	301	14.0k
Ronald Holzwarth	17.6k 0.6×	11.5k 0.6×	3.4k 1.1×	1.0k 0.5×	248 0.2×	266	19.5k
C. V. Shank	12.2k 0.4×	8.0k 0.4×	1.7k 0.5×	957 0.5×	2.0k 1.3×	160	16.9k
Margaret M. Murnane	19.1k 0.7×	5.0k 0.3×	3.4k 1.1×	6.0k 3.0×	1.5k 1.0×	411	22.7k
Franz X. Kärtner	13.7k 0.5×	12.6k 0.6×	1.5k 0.5×	1.1k 0.5×	779 0.5×	650	18.3k
Henry C. Kapteyn	20.0k 0.7×	5.3k 0.3×	3.6k 1.1×	6.3k 3.2×	1.5k 1.0×	448	23.7k
Peixiang Lu	10.6k 0.4×	4.8k 0.2×	2.4k 0.8×	2.0k 1.0×	2.3k 1.4×	746	14.9k
Jens Limpert	14.9k 0.5×	14.8k 0.7×	825 0.3×	1.4k 0.7×	272 0.2×	638	18.5k
Jerome V. Moloney	11.7k 0.4×	7.5k 0.4×	1.0k 0.3×	1.0k 0.5×	763 0.5×	591	15.4k
A. Mysyrowicz	13.0k 0.5×	3.9k 0.2×	2.6k 0.8×	2.8k 1.4×	1.1k 0.7×	297	15.3k

Countries citing papers authored by U. Keller

Since Specialization

Citations

This map shows the geographic impact of U. Keller's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by U. Keller with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites U. Keller more than expected).

Fields of papers citing papers by U. Keller

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by U. Keller. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by U. Keller. The network helps show where U. Keller may publish in the future.

Co-authorship network of co-authors of U. Keller

This figure shows the co-authorship network connecting the top 25 collaborators of U. Keller. A scholar is included among the top collaborators of U. Keller based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with U. Keller. U. Keller is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Willenberg, Benjamin, et al.. (2025). Ultra-low noise spectral broadening of two combs in a single ANDi fiber. APL Photonics. 10(3). 2 indexed citations

Pupeikis, Justinas, Benjamin Willenberg, Lukas Lang, et al.. (2025). 3D in-situ profiling in a laser micromachining station using dual-comb LiDAR. Optics Continuum. 4(9). 2220–2220. 1 indexed citations

Lang, Lukas, et al.. (2024). Ultrafast 550-W average-power thin-disk laser oscillator. Optica. 11(10). 1368–1368. 17 indexed citations

Zhu, Zhiwei, Benjamin Willenberg, Justinas Pupeikis, et al.. (2024). Scan-less 3D microscopy based on spatiotemporal encoding on a single-cavity dual-comb laser. Optics Letters. 49(7). 1766–1766. 3 indexed citations

Pupeikis, Justinas, et al.. (2024). High-sensitivity dual-comb and cross-comb spectroscopy across the infrared using a widely tunable and free-running optical parametric oscillator. Nature Communications. 15(1). 7211–7211. 9 indexed citations

Willenberg, Benjamin, C. R. Phillips, Justinas Pupeikis, et al.. (2024). THz-TDS with gigahertz Yb-based dual-comb lasers: noise analysis and mitigation strategies. Applied Optics. 63(15). 4144–4144. 8 indexed citations

Gallmann, L., et al.. (2023). Ultrafast Transition from State-Blocking Dynamics to Electron Localization in Transition Metal β-Tungsten. Physical Review Letters. 131(22). 226901–226901. 8 indexed citations

Barh, Ajanta, et al.. (2023). Low-Noise Femtosecond SESAM Modelocked Diode-Pumped Cr:ZnS Oscillator. IEEE Journal of Quantum Electronics. 59(1). 1–7. 7 indexed citations

Golling, M., et al.. (2023). Gigahertz semiconductor laser at a center wavelength of 2 µm in single and dual-comb operation. Optics Express. 32(1). 26–26. 9 indexed citations

10.

Jankowski, Marc, Valentin J. Wittwer, Norbert Modsching, et al.. (2023). Monolithically integrated femtosecond optical parametric oscillators. Optica. 10(7). 826–826. 12 indexed citations

11.

Pupeikis, Justinas, Benjamin Willenberg, Abdelmjid Benayad, et al.. (2022). Spatially multiplexed single-cavity dual-comb laser. Optica. 9(7). 713–713. 50 indexed citations

12.

Lang, Lukas, et al.. (2022). Influence of disk aberrations on high-power thin-disk laser cavities. Optics Express. 30(22). 39691–39691. 5 indexed citations

13.

Hillbrand, Johannes, Maximilian Beiser, Robert Weih, et al.. (2021). High-speed interband cascade infrared photodetectors: photo-response saturation by a femtosecond oscillator. Optics Express. 29(9). 14087–14087. 10 indexed citations

14.

Willenberg, Benjamin, F. Brunner, C. R. Phillips, & U. Keller. (2020). High-power picosecond deep-UV source via group velocity matched frequency conversion. Optica. 7(5). 485–485. 19 indexed citations

15.

Pupeikis, Justinas, et al.. (2019). Programmable pulse shaping for time-gated amplifiers. Optics Express. 27(1). 175–175. 6 indexed citations

16.

Volkov, Mikhail, et al.. (2019). Ultrafast nuclear dynamics of the acetylene cation C₂H₂⁺ and its impact on the infrared probe pulse induced C–H bond breaking efficiency. Physical Chemistry Chemical Physics. 21(33). 18380–18385. 5 indexed citations

17.

Mayer, A., C. R. Phillips, & U. Keller. (2017). Watt-level 10-gigahertz solid-state laser enabled by self-defocusing nonlinearities in an aperiodically poled crystal. Nature Communications. 8(1). 1673–1673. 59 indexed citations

18.

Oehler, A. E. H., et al.. (2007). Moving towards 100 GHz from a passively mode-locked Er:Yb:glass laser at 1.5 μm. 1–1.

19.

Marchese, S. V., Shigeki Hashimoto, C. R. E. Baer, et al.. (2007). Passively mode-locked thin disk lasers reach 10 microjoules pulse energy at megahertz repetition rate and drive high field physics experiments. 1–1. 4 indexed citations

20.

Maas, D. J. H. C., A.-R. Bellancourt, B. Rudin, et al.. (2007). MIXSELs - a new class of ultrafast semiconductor lasers. 1–1. 2 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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