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We demonstrate the deterministic control of femtosecond dual-comb soliton motion in an Er:fiber laser. Introducing fast intra-cavity modulation, we control individual solitons within two interlaced soliton combs in the harmonically-modelocked state. Upon extra-cavity recombination of both combs, we can obtain reconfigurable pulse pairs at arbitrary delays. Based on realtime spectroscopy, we resolve the transient inter-soliton trajectories.The approach employs laser-intrinsic soliton dynamics and provides all-optically swept pulse pairs for i.e. pump-probe spectroscopy at ⪆kHz scanning frequencies.
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Julia A. Lang, Sarah R. Hutter, Alfred Leitenstorfer, Georg Herink, "Controlling intracavity dual-comb soliton motion for programmable pulse pattern generation," Proc. SPIE PC12870, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications IX, PC1287002 (13 March 2024); https://doi.org/10.1117/12.3004428