Ptychographic ultrafast pulse reconstruction

TL;DR

This paper introduces a novel ultrafast pulse reconstruction method inspired by ptychography, offering faster convergence, no time ambiguity, and fewer spectral recordings compared to existing techniques.

Contribution

It presents a new ptychography-based ultrafast pulse reconstruction technique with improved speed, accuracy, and reduced spectral data requirements.

Findings

No time ambiguity in pulse reconstruction.

Fewer spectra needed for accurate results.

Fast convergence of the reconstruction algorithm.

Abstract

We demonstrate a new ultrafast pulse reconstruction modality which is somewhat reminiscent of frequency resolved optical gating but uses a modified setup and a conceptually different reconstruction algorithm that is derived from ptychography. Even though it is a second order correlation scheme it shows no time ambiguity. Moreover, the number of spectra to record is considerably smaller than in most other related schemes which, together with a robust algorithm, leads to extremely fast convergence of the reconstruction.