Random quasi-phase-matching in polycrystalline media and its effects on pulse coherence properties

  • Gu J
  • Schweinsberg A
  • Vanderhoef L
  • et al.
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Abstract

Polycrystalline materials can mediate efficient frequency up-conversion for mid-infrared light. Motivated by the need to understand the properties of the harmonic and supercontinuum radiation from such media, we utilize realistic numerical simulations to reveal its complex temporal and spatial structure. We show that the generated radiation propagates in the form of long-duration pulse trains that can be difficult to compress and that optical filamentation in high-energy pulses gives rise to fine-structured beam profiles. We identify trends concerning pulse energy, sample length, and the microstructure of the material that can inform optimization for different applications.

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Gu, J., Schweinsberg, A., Vanderhoef, L., Tripepi, M., Valenzuela, A., Wolfe, C., … Kolesik, M. (2021). Random quasi-phase-matching in polycrystalline media and its effects on pulse coherence properties. Optics Express, 29(5), 7479. https://doi.org/10.1364/oe.418198

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