Recent Developments in Four-Wave Light Mixing and Two-Photon Absorption Spectroscopy

  • N. Bloembergen
Conference paper


When three tunable laser beams, at frequencies ω0, ω1 and ω2, respectively, are incident on an atomic vapor, liquid or crystal, a third order polarization at the combination frequency ω3 = ω0 + ω1 − ω2 is created. The intensity generated at ω3 reveals resonant interference terms of the material system at ω0 + ω1, ω0 − ω2 and ω1 − ω2, respectively. Such interference terms permit the relative nonlinearities of various two-photon absorption and Raman resonant excitations to be calibrated.

Copyright information

© Springer Science+Business Media New York 1978

Authors and Affiliations

  • N. Bloembergen
    • 1
  1. 1.Harvard UniversityCambridgeUSA

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