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Institute Colloquium


Dr. Benjamin Wetzel


Smart Photonics:

From nonlinear pulse shaping and advanced characterization to multidimensional wavepacket control and applications

March 5, 2024

Start: 2:00 p.m.

Seminar Room at Leibniz IPHT


Contact persons at Leibniz IPHT: Mario Chemnitz

Benjamin Wetzel received his Ph.D. in Photonics from the University of Franche-Comté (Besançon, France) in 2012. He is currently a tenure CNRS Researcher at the Xlim Research Institute (CNRS – UMR7252, Limoges, France) since 2019. He is a former Marie-Curie Fellow (EU), Helena Normanton Fellow (UK) and an ERC Starting Grant laureate (EU) with an expertise in ultrafast photonics and nonlinear optics. His core know-hows are mostly related to ultrashort pulse manipulation and nonlinear frequency conversion processes in fibered and integrated platforms.

Over the years, his work carried out in France, Canada and UK led to several advances in fields spanning nonlinear fiber optics and integrated photonics systems, including disruptive schemes of laser mode-locking and efficient frequency comb formation, the smart & integrated control of supercontinuum generation, as well as landmark results in quantum optical states generation and ultrafast photonics instrumentation.  He is an Optica Senior Member with over 200 journal and conference contributions since 2010.


Over the last years, the fields of ultrafast and nonlinear photonics experienced significant advances, where machine learning played a key role in many research efforts. These advances, beyond the algorithmic aspects, are often based on the implementation of efficient characterization techniques paired with optical pulse processing mechanisms adapted for the control of the nonlinear dynamics at play during guided pulse propagation.

Here, we review our recent works on this field bundling optical signal shaping and advanced characterization through a few examples with complementary experimental approaches: spectro-temporal control of coherent supercontinua obtained in a hybrid fibrer-integrated architecture, spectral optimization of incoherent signals generated via noise-driven nonlinear mechanisms  in optical fibers, extension to the spatial dimension via the potential adjustment of intermodal couplings in a multimode fibre.

In this presentation, we show that simple optimization techniques can be exploited to control a variety of nonlinear effects in guided optics platforms and thus generate optical wave packets with multidimensional properties that can be customized according to the desired application, particularly relevant for several nonlinear imaging modalities.

The lecture will be given in English.