Supercontinuum in Ultrafast Pulse Compression

doi:10.1007/0-387-25097-2_18

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“…One of the most spectacular and visual effects generated by the nonlinear propagation of intense femtosecond laser pulses in a transparent medium is dramatic broadening of the spectrum, termed as supercontinuum generation. [1,2] The wavelength of the supercontinuum ranges from the UV to the mid-infrared. [3][4][5] Therefore, the supercontinuum has a wide range of potential applications in various research fields, such as femtosecond time-resolved spectroscopy, [6] optical pulse compression, [7] optical parametric amplification, [8] and broadband spectrum light detecting and ranging (LIDAR).…”

Section: Introductionmentioning

confidence: 99%

Orientation-dependent depolarization of supercontinuum in BaF₂ crystal*

Li¹,

Cheng²,

Shao³

et al. 2020

Chinese Phys. B

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We present a systematic investigation of the depolarization properties of a supercontinuum accompanied with femtosecond laser filamentation in barium fluoride (BaF2) crystal. It is found that the depolarization of the supercontinuum depends strongly on the crystal orientations with respect to the incident laser polarization. At most crystal orientations, the depolarization of the supercontinuum rises with the increase of the input laser energies and finally saturates. While at 45°, the depolarization of the supercontinuum is not changed and keeps nearly negligible with the increase of the input laser energies. These peculiar depolarization properties of the supercontinuum can be ascribed to the orientation dependence of the cross-polarized wave (XPW) generation and ionization-induced plasma scattering in the BaF2 crystal.

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