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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1995),
  • paper QWG1

Two-dimensional nonlinear optics using femtosecond spectral interferometry

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Abstract

The nonlinear second-order optical response of a material is not fully characterized until the susceptibility tensor χ(2)(ω,, ω2) is known for all values of frequencies ω, and ω2. More than merely characterizing the material optical properties, the two-dimensional response provides essential information on the excited states of the system. This is illustrated in Fig. 1, in which |χ(2)1, ω2)| is plotted for a three-level system. The most intense features result from double resonances, which are directly sensitive to the coupling between the excited states. A more conventional measurement, such as frequency-resolved second-harmonic-generation efficiency, corresponds only to a section ω1 = ω2 of the response function.

© 1995 Optical Society of America

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