Speaker: Prof. Serge Bielawski
Affiliation: Université des Sciences et Technologies de Lille 1 Lille, France

Abstract:
Photonic time-stretch and time-lenses are photonic strategies aiming at recording complex signals in single-shot over long time windows. We show how photonic time-stretch based « terahertz oscilloscopes » can be designed for recording the electric field evolution of freepropagating terahertz pulses in single-shot, at multi-MHz repetition rates. This allowed direct measurements of electron bunch shapes to be performed in electron accelerators, at synchrotron radiation SOLEIL (France), KARA (Germany) and European XFEL. Strategies destined to high sensitivity, and high temporal resolution will be discussed. We will also present recent results on the recording of complex optical signals (amplitude and phase) in single-shot using phase-sensitive temporal imaging.

Biography
Prof. Serge Bielawski is a researcher at PhLAM Laboratory in Lille, France. His initial research activity (1989-2003) focused on experimental and theoretical aspects of instabilities, in particular in lasers, as chaos, chaos control, and pattern formation. Since 2003, he developed an activity at the interfaces between accelerator physics, photonics and nonlinear dynamics, in collaboration with several synchrotron radiation and Free-Electron Lasers facilities, in particular UVSOR (Japan), Super-ACO and SOLEIL (France), KARA (Germany), and European XFEL.

There will be food and refreshments provided!

For more information, contact Prof. Bahram Jalali (jalali@ucla.edu)

Date/Time:
Date(s) - Feb 08, 2019
4:00 pm - 5:00 pm

Location:
E-IV Faraday Room #67-124
420 Westwood Plaza - 6th Flr., Los Angeles CA 90095