Generation of few-cycle pulses in media with alternating sign of effective cubic nonlinearity

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Abstract

An original technique is developed for spectral broadening of femtosecond pulses with compensation for the nonlinear spatial phase during the propagation through nonlinear media with effective cubic nonlinearity of different signs. It was shown that in the region of 1.5 μm, the proposed scheme with BBO crystals at the first stage and NaCl at the second stage allows, using chirped mirrors, the formation of few-cycle pulses of about 7 fs duration with a small B-integral. The possibility of focusing of pulses compressed in the proposed scheme with a large Strehl ratio is demonstrated.

Original languageEnglish
Pages (from-to)343-349
Number of pages7
JournalQuantum Electronics
Volume50
Issue number4
DOIs
Publication statusPublished - 1 Apr 2020

Keywords

  • few-cycle pulses
  • nonlinear compression
  • cubic nonlinearity
  • negative cascaded quadratic nonlinearity
  • multi-element spectral broadening
  • Strehl ratio
  • LASER-PULSES
  • COMPRESSION
  • POWER

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