Complete characterization of ultrafast optical fields by phase-preserving nonlinear autocorrelation.

ABSTRACT: Nonlinear autocorrelation was one of the earliest and simplest tools for obtaining partial temporal information about an ultrashort optical pulse by gating it with itself. However, since the spectral phase is lost in a conventional autocorrelation measurement, it is insufficient for a full characterization of an ultrafast electric field, requiring additional spectral information for phase retrieval. Here, we show that introducing an intensity asymmetry into a conventional nonlinear interferometric autocorrelation preserves some spectral phase information within the autocorrelation signal, which enables the full reconstruction of the original electric field, including the direction of time, using only a spectrally integrating detector. We call this technique Phase-Enabled Nonlinear Gating w

SUBMITTER: Gliserin A 

PROVIDER: S-EPMC9485149 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature