Fig. 1: Essential idea of frequency comb ptychoscopy. | Nature Communications

Fig. 1: Essential idea of frequency comb ptychoscopy.

From: Frequency comb ptychoscopy

Fig. 1

An arbitrary spectrum is independently beat with two combs, resulting in a pair of spectrograms. By using a ptychoscopic inversion procedure, high-resolution mini-spectra are produced, representing the beating of the source with each comb line. These spectra are limited in bandwidth by photodetection, but their resolution is Fourier-limited. By compositing these spectra, a high-resolution broadband spectrum is produced.

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