Boris Bergues Ludwig-Maximilians-Universität Munich; Max-Planck-Institut für Quantenoptik, Garching; Germany; Joint Attosecond Science Laboratory, National Research Council of Canada and University of Ottawa, Canada
The ability to measure and control optical fields on a times scale shorter than a single oscillation period is crucial for a wide range of applications, ranging from attosecond spectroscopy to the development of future petahertz electronics. During the past decade, the rapid progress in laser technology and the resulting democratization of ultrafast science have created a high demand for ever more robust and user-friendly pulse characterization techniques. Ideally, the latter should be applicable at state-of-the-art high-repetition rates laser sources operating in different spectral ranges, and allow the full - possibly single-shot - reconstruction of the temporal field evolution. We will discuss several recent advances that have resulted in the development of simple, comparatively ‘low-tech’, and user-friendly pulse characterization solutions. In particular, we will focus on a novel approach relying on light-induced photocurrents in plasma, which allows the implementation of both single-shot CEP-measurement [1, 2] and femtosecond streaking  in ambient air. We will also discuss a new scheme facilitating single-shot dispersion sampling . All of these techniques can be easily implemented in most ultra-fast science laboratories.
Reference:  B. Bergues, The circular-polarization phase-meter, Optics Express 20, 25317 (2012).  M. Kubullek et al., Single-shot carrier–envelope-phase measurement in ambient air, Optica 7, 35 (2020)  A. Korobenko, et al., Femtosecond streaking in ambient air, Optica 7, 1372 (2020).  A. Korobenko, et al., Single-shot Dispersion Sampling for Optical Pulse Reconstruction, Optics Express 29, 11845 (2021).