Recording complex terahertz pulse shapes in single-shot is needed in various applications, ranging from terahertz time-domain spectroscopy to real-time accelerator diagnostics. Among existing solutions, association of photonic time-stretch with electro-optic detection has been shown to provide the highest repetition rates. However a fundamental bottleneck in time resolution and bandwidth has severely limited those strategies so far. We present here the first demonstration of a time-stretch ADC, that is no more subjected to this time-resolution limit, by using the DEOS (Diversity Electro-Optic Sampling) reconstruction method [1]. Experiments are performed on the ELBE intense Terahertz source.
[1] Roussel et al., Light Science & Applications 11, 14 (2022) https://doi.org/10.1038/s41377-021-00696-2
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