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We present the latest results in extending dual-comb spectroscopy to two-photon resonances. By measuring two-photon excitation of rubidium vapor and water-dissolved fluorophores, we demonstrate both the high resolution and speed of the technique.
We present a non-intrusive laser based technique for tagging flows. The femtosecond laser electronic excitation tagging (FLEET) is based on writing patterns in air and following the nitrogen pink afterglow.
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