Nonlinear focusing of femtosecond pulses as a result of self-reflection from a saturable absorber

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We calculate the spatiotemporal evolution of intense, femtosecond pulses that are incident upon a saturahle absorbing interface in the regime of self-reflection, using the finite-difference time-domain computational method. The pulses induce a curved, moving absorption front in the nonlinear medium that acts as a transient focusing mirror for the reflected pulse energy.

Original languageEnglish (US)
Pages (from-to)239-241
Number of pages3
JournalOptics letters
Issue number4
StatePublished - Feb 15 1997


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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