Induced focusing of optical pulses in a self-defocusing semiconductor medium

G. Khitrova, H. M. Gibbs, R. Jin, Jiajin Xu, D. Boggavarapu

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The novel phenomenon of induced focusing predicted to occur in a self-defocusing non-linear medium is reported experimentally. A 10 ps pump pulse optically induces a refractive index spatial profile in a GaAs/AlGaAs planar waveguide which results in induced focusing of a subsequent weak copropagating probe pulse for appropriate relative spatial positions. With pump and probe pulses separated by one beam waist, the probe output peak intensity is increased by 40%. These observations are consistent with two-transverse-dimension beam-propagation computations with the carrier-density-dependent optical non-linearity modelled by the plasma theory.

Original languageEnglish (US)
Article number001
Pages (from-to)73-78
Number of pages6
JournalQuantum Optics: Journal of the European Optical Society Part B
Issue number2
StatePublished - 1992

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Engineering


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