Forthcoming Events

30.08.2020 - 04.09.2020, Online (Europe)

News

New scientific highlights- from MUST researchers at PSI
Promotion to full professorcongratulations to Steve Johnson!
The Laser at 60: Ursula KellerOPN interviewed OSA Fellows
Former EPFL PhD student Edoardo Baldini wins the 2020 ACS PHYS Division Young Investigator Awards
New scientific highlights- by MUST PIs Banerji, Chergui and Wolf
Prix de l'innovation AGROVINA 2020- for Agrolase: detecting spores of pathogens in real time
Ruth Signorell receives the Humboldt Prize- awarded in recognition of outstanding achievements in research and teaching
New scientific highlights- by MUST PIs Keller, Chergui, Richardson / Vanicek, Wörner, Castiglioni / Osterwalder / Hengsberger / van Bokhoven
Ursula Keller wins the SPIE 2020 Gold Medal- awarded in recognition of outstanding engineering or scientific accomplishments
Nobel Prize winner Gerard Mourou - Physics Colloquium 11.12.19: Passion Extreme Light

IEEE Edison Medal awarded to Ursula Keller

edison
The remarkable innovations of Ursula Keller have pushed the frontiers in ultrafast science and technology by providing solid-state and semiconductor lasers with ultrashort pulse generation that are revolutionizing photonics and tremendously impacting physics, biology, and telecommunications. Keller developed the semiconductor saturable absorber mirror (SESAM) for generating ultrashort pulses, which transformed femtosecond lasers from complex devices only used by specialists to reliable instruments suitable for use in any general-purpose scientific laboratory. She has since continued to define and push the technology with world-leading experimental results that have demonstrated orders of magnitude improvement in key features such as pulse duration, energy, and average power. Her SESAM technology overcame switching instabilities that had prevented modelocking of solid-state lasers for more than two decades and demonstrated how to generate picosecond and femtosecond pulses from diode-pumped laser technology lasers in a scalable, stable, and reliable manner.

Keller also pioneered vertical external cavity surface emitting lasers (VECSELs), which provide superior beam quality even at high powers compared to other semiconductor lasers and can operate both in the continuous wave and pulsed regimes. Combining the merits of SESAM and VECSELs, Keller proposed and demonstrated a new concept for the generation of ultrashort optical pulses from an all-semiconductor laser system. The modelocked integrated external-cavity surface emitting laser (MIXSEL) enables wafer-scale integration of gain and saturable absorption that allows simple and compact ultrafast lasers to be realized with the potential for high-volume manufacturing. She led her research group to overcome extreme technical challenges to achieve a 150-fold increase in the power emitted by MIXSELs. Keller’s development of carrier phase stabilization and frequency comb technology during the 1990s was integral to Hänsch and Hall’s development of laser-based spectroscopy that garnered them the 2005 Nobel Prize in Physics.

An IEEE Fellow and recipient of the Optical Society’s Charles H. Townes Award (2015) and the 2018 IEEE Photonics Award, Keller is director of the Swiss National Centre of Competence for Research in Molecular Ultrafast Science and Technology (NCCR MUST) at ETH Zürich, Zürich, Switzerland.


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