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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 7, Iss. 3 — Jul. 31, 2000
  • pp: 107–112

Separation of coherent and incoherent nonlinearities in a heterodyne pump—probe experiment

P. Borri, F. Romstad, W. Langbein, A. E. Kelly, J. Mørk, and J. M. Hvam  »View Author Affiliations

Optics Express, Vol. 7, Issue 3, pp. 107-112 (2000)

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We demonstrate that the transient coherent nonlinearity (coherent artifact) affecting the pump-probe response of semiconductor optical amplifiers can be experimentally separated from the incoherent transient. The technique is based on measuring the mirror component of the coherent artifact which is a background-free four—wave mixing signal at a different frequency with respect to the transmitted probe in a heterodyne detection scheme. Measurements on amplifiers of different length reveal strong deviations from the commonly expected symmetric shape of the coherent artifact in case of long waveguides.

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OCIS Codes
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
(320.0320) Ultrafast optics : Ultrafast optics

ToC Category:
Research Papers

Original Manuscript: July 6, 2000
Published: July 31, 2000

Paola Borri, Francis Romstad, Wolfgang Langbein, A. Kelly, J. Mork, and Jorn Hvam, "Separation of coherent and incoherent nonlinearities in a heterodyne pump-probe experiment," Opt. Express 7, 107-112 (2000)

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