https://doi.org/10.1051/epjconf/202328708001
Eliminating local convergences in FROG retrieval algorithms
KTH Royal Institute of Technology, Department of Applied Physics, Roslagstullsbacken 21, 106 91 Stockholm, Sweden
* Corresponding author: kroo@kth.se
Published online: 18 October 2023
The complicated electric field structure of ultrashort pulses as characterized by frequency-resolved optical gating (FROG) algorithms often results in local convergence, which does not accurately represent the actual field pulse. We present an efficient and universal test procedure applicable to any FROG retrieval algorithm that allows recognition of the erroneous local convergence. The 100% efficacy of the procedure is demonstrated using Line-Search FROG algorithm, and comparison is given with the performance of a standard extended ptychographic iterative FROG trace retrieval engine.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
