Our Aim

Our objective is the development of simple, fast, and low-cost technology for the temporal characterization of optical fields. We aim at a small and user-friendly field characterization device that is robust with respect to long-term drifts of the laser source parameters. By optimizing the single-shot detection sensitivity and spectral bandwidth we will facilitate its application to high repetition rate laser sources of 100 kHz and beyond.

The project is dedicated to bringing technology for next generation characterization of optical fields to a market level. The technology, based on recent innovations at LMU [1-3], will facilitate simple optoelectronic devices, for e.g. carrier-envelope-phase (CEP) measurements, enabling the characterization of few-cycle pulses at a single laser shot level. Contemporary CEP-meter techniques, i.e. the f-2f interferometer and Sterero-ATI technique, have limitations, including they do not easily offer extension of single-shot measurements towards increasing repetition rates (beyond 100 kHz), have limited operation wavelengths, or involve a sophisticated apparatus, which is bulky and expensive. Based on our recent innovation, the realization of a simple phase meter [2] that consists of only a few components and can even work in ambient air, we introduce developed world leading electronics that enables the single-shot phase detection with a precision below 100 attoseconds (as).

[1] B. Bergues, The circular-polarization phase-meter, Optics Express 20, 25317 (2012)

[2] M. Kubullek, Z. Wang, K. von der Brelje, D. Zimin, P. Rosenberger, J. Schötz, M. Neuhaus, S. Sederberg, A. Staudte, N. Karpowicz, M. F. Kling, and B. Bergues, „Single-shot carrier–envelope-phase measurement in ambient air,“ Optica 7, 35-39 (2020)

[3] Schötz, J., Maliakkal, A., Blöchl, J., Zimin, D., Wang, Z., Rosenberger, P., Alharbi, M., Azzeer, A. M., Weidman, M., Yakovlev, V. S., Bergues, B., and Kling, M. F., The emergence of macroscopic currents in photoconductive sampling of optical fields. Nat Commun 13, 962 (2022).