We review tri-comb spectroscopy, a novel optical approach to nonlinear spectroscopy. This optical method that we have recently developed enables the measurement of comb resolution multidimensional coherent spectra in under one second. We show the improvement in resolution and acquisition speed by applying the method to Doppler broadened rubidium vapor. We also show how this method can be used for real-time chemical sensing applications.
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Lomsadze et al. (2019) studied this question.
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