Propagation Effects in the Characterization of 1.5-Cycle Pulses by XPW Dispersion Scan

Abstract : Few-cycle pulse characterization methods face a serious challenge in providing sufficient signal-to-noise ratios together with superior spectral fidelity, as imposed by phase-matching conditions and linear dispersion effects. Here we investigate the effect of linear dispersion inside the nonlinear medium inherently present in such arrangements. We demonstrate that pulse characterization using a cross-polarized wave generation dispersion scan is surprisingly insensitive to the group-velocity dispersion itself. We characterize sub-4 fs pulses at 780 nm center the wavelength utilizing crystals of different thicknesses, yielding nearly identical pulse shapes. Numerical simulations shed light on this behavior indicating practical limits of usable medium lengths.
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https://hal-ensta-paris.archives-ouvertes.fr//hal-02057612
Contributor : Pierre Zaparucha <>
Submitted on : Tuesday, March 5, 2019 - 2:30:09 PM
Last modification on : Monday, July 8, 2019 - 2:59:25 PM

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Ayhan Tajalli, Marie Ouillé, Aline Vernier, Frederik Böhle, Esmerando Escoto, et al.. Propagation Effects in the Characterization of 1.5-Cycle Pulses by XPW Dispersion Scan. IEEE Journal of Selected Topics in Quantum Electronics, Institute of Electrical and Electronics Engineers, 2019, 25 (4), pp.1-7. ⟨10.1109/JSTQE.2018.2867442⟩. ⟨hal-02057612⟩

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