Abstract
Ultrashort pulses are used in numerous applications. Characterization of these pulses requires indirect schemes. A popular technique for characterizing ultrashort pulses is frequency-resolved optical gating (FROG) [1]. It is an established and recently mathematically proven [2] approach for full characterization of the amplitude and phase of ultrashort optical pulses. The reconstruction of pulses from these FROG measurements requires an algorithm that can solve a 4th order phase retrieval problem. Such common algorithms, the Principle Component General Projections Algorithm (PCGPA) [3] and recently proposed Ptychographic FROG [4] perform well at high SNR. However, while these algorithms perform well at low SNR after filtering the FROG trace, their performance drops at raw low SNR data.
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