World's Best Scientists 2026 revealed!
Ursula Keller

Ursula Keller

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Best Female Scientists
2025

D-Index & Metrics

Best Female Scientists

D-Index
120
Citations
52638
World Ranking
563
National Ranking
3

Physics

D-Index
122
Citations
53556
World Ranking
756
National Ranking
16

Ursula Keller publication distribution in Physics in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Physics in 2026. The highlighted bar marks where Ursula Keller sits on this spectrum.

103–122 publications: 7 scientists 123–142 publications: 10 scientists 143–162 publications: 31 scientists 163–182 publications: 35 scientists 183–202 publications: 53 scientists 203–222 publications: 81 scientists 223–242 publications: 85 scientists 243–262 publications: 112 scientists 263–282 publications: 114 scientists 283–302 publications: 126 scientists 303–322 publications: 136 scientists 323–342 publications: 162 scientists 343–362 publications: 155 scientists 363–382 publications: 156 scientists 383–402 publications: 134 scientists 403–422 publications: 145 scientists 423–442 publications: 147 scientists 443–462 publications: 131 scientists 463–482 publications: 131 scientists 483–502 publications: 116 scientists 503–522 publications: 106 scientists 523–542 publications: 103 scientists 543–562 publications: 87 scientists 563–582 publications: 84 scientists 583–602 publications: 94 scientists 603–622 publications: 70 scientists 623–642 publications: 76 scientists 643–662 publications: 60 scientists 663–682 publications: 54 scientists 683–702 publications: 60 scientists 703–722 publications: 48 scientists 723–742 publications: 64 scientists 743–762 publications: 48 scientists 763–782 publications: 37 scientists 783–802 publications: 43 scientists 803–822 publications: 34 scientists 823–842 publications: 36 scientists 843–862 publications: 32 scientists 863–882 publications: 32 scientists 883–902 publications: 31 scientists 903–922 publications: 25 scientists 923–942 publications: 15 scientists 943–962 publications: 24 scientists 963–982 publications: 13 scientists 983–1,002 publications: 21 scientists 1,003–1,022 publications: 21 scientists 1,023–1,042 publications: 16 scientists 1,043–1,062 publications: 9 scientists 1,063–1,082 publications: 19 scientists 1,083–1,102 publications: 11 scientists 1,103–1,122 publications: 17 scientists 1,123–1,142 publications: 11 scientists 1,143–1,162 publications: 7 scientists 1,163–1,182 publications: 4 scientists 1,183–1,202 publications: 10 scientists 1,203–1,222 publications: 8 scientists 1,223–1,242 publications: 16 scientists 1,243–1,262 publications: 4 scientists 1,263–1,282 publications: 10 scientists 1,283–1,302 publications: 5 scientists 1,303–1,322 publications: 7 scientists 1,323–1,342 publications: 4 scientists 1,343–1,362 publications: 8 scientists 1,363–1,382 publications: 6 scientists 1,383–1,402 publications: 7 scientists 1,403–1,422 publications: 3 scientists 1,423–1,442 publications: 4 scientists 1,443–1,462 publications: 4 scientists 1,463–1,468 publications: 3 scientists 1,469+ publications: 100 scientists
103 publications 1,469+

This scientist: 1,254 publications — 96th percentile

96% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,469 publications or more.

Ursula Keller D-index placement in Physics in 2026

The chart shows the D-index (discipline H-index) distribution of Physics scientists ranked by Research.com in 2026. The highlighted bar marks where Ursula Keller sits on this spectrum.

70–71 D-Index: 76 scientists 72–73 D-Index: 110 scientists 74–75 D-Index: 143 scientists 76–77 D-Index: 153 scientists 78–79 D-Index: 144 scientists 80–81 D-Index: 167 scientists 82–83 D-Index: 167 scientists 84–85 D-Index: 166 scientists 86–87 D-Index: 132 scientists 88–89 D-Index: 155 scientists 90–91 D-Index: 134 scientists 92–93 D-Index: 137 scientists 94–95 D-Index: 102 scientists 96–97 D-Index: 112 scientists 98–99 D-Index: 110 scientists 100–101 D-Index: 116 scientists 102–103 D-Index: 97 scientists 104–105 D-Index: 103 scientists 106–107 D-Index: 87 scientists 108–109 D-Index: 90 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 78 scientists 114–115 D-Index: 75 scientists 116–117 D-Index: 67 scientists 118–119 D-Index: 69 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 59 scientists 124–125 D-Index: 53 scientists 126–127 D-Index: 42 scientists 128–129 D-Index: 41 scientists 130–131 D-Index: 33 scientists 132–133 D-Index: 32 scientists 134–135 D-Index: 45 scientists 136–137 D-Index: 19 scientists 138–139 D-Index: 24 scientists 140–141 D-Index: 28 scientists 142–143 D-Index: 31 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 20 scientists 148–149 D-Index: 12 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 24 scientists 154–155 D-Index: 23 scientists 156–157 D-Index: 15 scientists 158–159 D-Index: 15 scientists 160–161 D-Index: 11 scientists 162–163 D-Index: 17 scientists 164–165 D-Index: 12 scientists 166–167 D-Index: 11 scientists 168–169 D-Index: 9 scientists 170–171 D-Index: 9 scientists 172–173 D-Index: 11 scientists 174–175 D-Index: 4 scientists 176–177 D-Index: 8 scientists 178–179 D-Index: 5 scientists 180–181 D-Index: 3 scientists 182–183 D-Index: 4 scientists 184 D-Index: 4 scientists 185+ D-Index: 99 scientists
70 D-Index 185+

This scientist: 122 D-Index — 80th percentile

80% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 185 D-Index or more.

Research.com Recognitions

  • 2025 - Research.com Best Female Scientists Award
  • 2020 - Frederic Ives Medal, The Optical Society For fundamental contributions to ultrafast lasers technology, especially in the development of high peak and average power oscillators and important breakthroughs in attosecond science.
  • 2019 - IEEE Edison Medal For pioneering and fundamental contributions to and leadership in useable, compact ultrafast laser technology, enabling applications in metrology, sensing, and biophotonics.
  • 2014 - SPIE Fellow
  • 2003 - OSA Fellows For pioneering contributions to the development of femtosecond laser technology and applications and the development of semiconductor saturable absorber mirrors.

Overview

Ursula Keller is affiliated with ETH Zurich in Switzerland and has published extensively in the fields of Physics and Astronomy and Engineering. Their research primarily focuses on Atomic and Molecular Physics, and Optics, as well as Electrical and Electronic Engineering, with notable contributions in Spectroscopy, Instrumentation, and Biomedical Engineering.

The scientist's main topics of work include:

  • Advanced Fiber Laser Technologies
  • Laser-Matter Interactions and Applications
  • Solid State Laser Technologies
  • Photonic and Optical Devices
  • Spectroscopy and Laser Applications
  • Semiconductor Lasers and Optical Devices
  • Photonic Crystal and Fiber Optics

Ursula Keller's recent papers demonstrate a focus on dual-comb lasers, femtosecond lasers, and high-speed quantum cascade detectors. Selected publications include:

  • Spatially multiplexed single-cavity dual-comb laser, 2022, published in Optica
  • Femtosecond dual-comb Yb:CaF2 laser from a single free-running polarization-multiplexed cavity for optical sampling applications, 2020, published in Optics Express
  • Ionization in intense laser fields beyond the electric dipole approximation: concepts, methods, achievements and future directions, 2021, published in Journal of Physics B Atomic Molecular and Optical Physics
  • Coherently averaged dual-comb spectroscopy with a low-noise and high-power free-running gigahertz dual-comb laser, 2023, published in Optics Express
  • High-speed quantum cascade detector characterized with a mid-infrared femtosecond oscillator, 2021, published in Optics Express

Frequent co-authors who have collaborated extensively with Ursula Keller include:

  • C. R. Phillips
  • Benjamin Willenberg
  • Justinas Pupeikis
  • M. Golling
  • Jonas Heidrich

The scientist frequently publishes in the following venues:

  • Optics Express
  • Conference on Lasers and Electro-Optics
  • EPJ Web of Conferences
  • Optica
  • arXiv (Cornell University)

In addition to research papers, Ursula Keller has authored a book titled Ultrafast Lasers, published by Springer Nature in 2021.

Ursula Keller has been recognized with several awards, including:

  • Frederic Ives Medal from The Optical Society in 2020, for contributions to ultrafast lasers technology and breakthroughs in attosecond science
  • IEEE Edison Medal in 2019, for pioneering work and leadership in compact ultrafast laser technology applicable to metrology, sensing, and biophotonics
  • SPIE Fellow in 2014
  • OSA Fellow in 2003, for pioneering contributions to femtosecond laser technology and semiconductor saturable absorber mirrors

Best Publications

  • Recent developments in compact ultrafast lasers

    Ursula Keller

  • Semiconductor saturable absorber mirrors (SESAM's) for femtosecond to nanosecond pulse generation in solid-state lasers

    U. Keller;K.J. Weingarten;F.X. Kartner;D. Kopf

  • Carrier-envelope offset phase control: A novel concept for absolute optical frequency measurement and ultrashort pulse generation

    H.R. Telle;G. Steinmeyer;A.E. Dunlop;J. Stenger

  • Q-switching stability limits of continuous-wave passive mode locking

    C. Hönninger;R. Paschotta;F. Morier-Genoud;M. Moser

  • Attosecond Ionization and Tunneling Delay Time Measurements in Helium

    P. Eckle;A. N. Pfeiffer;C. Cirelli;A. Staudte

  • Solid-state low-loss intracavity saturable absorber for Nd:YLF lasers : an antiresonant semiconductor Fabry-Perot saturable absorber

    U. Keller;D. A. B. Miller;G. D. Boyd;T. H. Chiu

  • Generation of intense, carrier-envelope phase-locked few-cycle laser pulses through filamentation

    Christoph Hauri;W. Kornelis;F. Helbing;A. Heinrich

  • Semiconductor saturable-absorber mirror assisted Kerr-lens mode-locked Ti:sapphire laser producing pulses in the two-cycle regime.

    Dirk H. Sutter;G. Steinmeyer;L. Gallmann;N. Matuschek

  • Frontiers in Ultrashort Pulse Generation: Pushing the Limits in Linear and Nonlinear Optics

    G. Steinmeyer;D. H. Sutter;L. Gallmann;N. Matuschek

  • Soliton mode-locking with saturable absorbers

    F.X. Kartner;I.D. Jung;U. Keller

  • Passively modelocked surface-emitting semiconductor lasers

    Ursula Keller;Anne C. Tropper

  • Ultrafast ytterbium-doped bulk lasers and laser amplifiers

    C. Hönninger;R. Paschotta;M. Graf;F. Morier-Genoud

  • Design and fabrication of double-chirped mirrors

    F. X. Kärtner;N. Matuschek;T. Schibli;U. Keller

  • Mode-locking with slow and fast saturable absorbers-what's the difference?

    F.X. Kurtner;J.A. der Au;U. Keller

  • Attoclock reveals natural coordinates of the laser-induced tunnelling current flow in atoms

    Adrian N. Pfeiffer;Claudio Cirelli;Mathias Smolarski;Darko Dimitrovski

  • Experimentally confirmed design guidelines for passively Q-switched microchip lasers using semiconductor saturable absorbers

    G. J. Spühler;R. Paschotta;R. Fluck;B. Braun

  • Passive mode locking with slow saturable absorbers

    R. Paschotta;U. Keller

  • Stabilization of solitonlike pulses with a slow saturable absorber

    F. X. Kärtner;U. Keller

  • 60-W average power in 810-fs pulses from a thin-disk Yb:YAG laser

    E. Innerhofer;T. Südmeyer;F. Brunner;R. Häring

  • Self-starting 6.5-fs pulses from a Ti:sapphire laser.

    I. D. Jung;F. X. Kärtner;N. Matuschek;D. H. Sutter

Frequent Co-Authors

Rüdiger Paschotta
Rüdiger Paschotta RP Photonics Consulting
Franz X. Kärtner
Franz X. Kärtner Universität Hamburg
Günter Steinmeyer
Günter Steinmeyer Humboldt-Universität zu Berlin
Klaus Petermann
Klaus Petermann Technical University of Berlin
Martin M. Fejer
Martin M. Fejer Stanford University
Michal Lipson
Michal Lipson Columbia University
Alexander L. Gaeta
Alexander L. Gaeta Columbia University
Günter Huber
Günter Huber Universität Hamburg
Yoshitomo Okawachi
Yoshitomo Okawachi Columbia University
Fetah Benabid
Fetah Benabid Xlim Research Institute

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