Luc Thévenaz

Biography

Luc Thévenaz received in 1982 the M.Sc. degree in astrophysics from the Observatory of Geneva, Switzerland, and in 1988 the Ph.D. degree in physics from the University of Geneva, Switzerland. He developed at this moment his field of expertise, i.e. fibre optics.
 In 1988 he joined the Swiss Federal Institute of Technology of Lausanne (EPFL) where he led a research group involved in photonics, namely fibre optics and optical sensing. Since 2023, he is EPFL Emeritus Professor.
 Research topics include Brillouin-scattering fibre sensors, nonlinear fibre optics, slow & fast light and laser spectroscopy in gases.
 
 His main achievements are:
 - the invention of a novel configuration for distributed Brillouin fibre sensing based on a single laser source, resulting in a high intrinsic stability making for the first time field measurements possible,
 - the development of a photoacoustic gas trace sensor using a near infra-red semiconductor laser, detecting a gas concentration at the ppb level,
 - the first experimental demonstration of optically-controlled slow & fast light in optical fibres, realized at ambient temperature and operating at any wavelength since based on stimulated Brillouin scattering. The first negative group velocity of light was also realized in optical fibres using this approach.
- the demonstration that amplification through stimulated Brillouin scattering in gases can outperform any nonlinear gain observed to date and offers innovative and nice prospects for sensing and amplification using the novel hollow core fibres.
 
 In 1991, he visited the PUC University in Rio de Janeiro, Brazil where he worked on the generation of picosecond pulses in semiconductor lasers.
 In 1991-1992 he stayed at Stanford University, USA, where he participated in the development of a Brillouin laser gyroscope.
 He joined in 1998 the company Orbisphere Laboratories SA in Neuchâtel, Switzerland, as Expert Scientist to develop gas trace sensors based on photoacoustic laser spectroscopy.
 In 1998 and 1999 he visited the Korea Advanced Institute of Science and Technology (KAIST) in Daejon, South Korea, where he worked on fibre laser current sensors.
 In 2000 he co-founded the spin-off company Omnisens that is developing and commercializing advanced photonic instrumentation.
 In 2007 he visited Tel Aviv University where he studied the all-optical control of polarization in optical fibres.
 During winter 2010 he stayed at the University of Sydney where he studied applications of stimulated Brillouin scattering in chalcogenide waveguides.
 In 2014 he stayed at the Polytechnic University of Valencia where he worked on microwave applications of stimulated Brillouin scattering.
 
 He was member of the Consortium in the FP7 European Project GOSPEL "Governing the speed of light", was Chairman of the European COST Action 299 "FIDES: Optical Fibres for New Challenges Facing the Information Society" and is author or co-author of some 480 publications and 12 patents. He is now Coordinator of the H2020 Marie Skłodowska-Curie Innovative Training Networks FINESSE (FIbre NErve Systems for Sensing).
 
 He is co-Executive Editor-in-Chief of the journal "Nature Light: Science & Applications" and is Member of the Editorial Board (Associate Editor) for the journal "APL Photonics" & "Laser & Photonics Reviews". He is also Fellow of both the IEEE and the Optical Society (OSA) and Full Member of the Swiss Academy of Engineering Sciences  (SATW).

Name pronunciation

I have frequently observed that the pronunciation of my family name causes an embarrassing situation to non-Swiss people, including native French people.
 Here is the rule: the "h" and the final "z" are not pronounced.
 Using an English phonetic transcription my last name must be pronounced "Teyvannah".
 Easier to say than to write!

Mission

Please note that the Group for Fibre Optics is no longer hiring new collaborators since my academic supervision will be discontinued mid-2023.