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Low-Order Harmonic Generation in Mid-Infrared Laser Filaments in Gases

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Abstract

We detect up to 11th-order harmonics generated through filamentation of ultrashort laser pulses at 3.9µm wavelength in air and argon. Harmonic’s spectra map the nonlinear evolution of the mid-infrared driver and exhibit CEP-dependent spectral interference.

© 2019 The Author(s)

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