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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Competing nonlinearities in quadratic nonlinear waveguide arrays.

Frank Setzpfandt1, Dragomir N Neshev, Roland Schiek

  • 1Friedrich-Schiller-University Jena, Max-Wien-Platz 1, 07743 Jena, Germany. f.setzpfandt@uni-jena.de

Optics Letters
|November 21, 2009
PubMed
Summary
This summary is machine-generated.

Researchers found competing nonlinearities in a double-resonant optical system. This leads to inhibited nonlinear beam self-action, regardless of power, in both normal and anomalous diffraction regimes.

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Area of Science:

  • Nonlinear optics
  • Waveguide optics
  • Quantum optics

Background:

  • Nonlinear optical systems exhibit complex behaviors due to light-matter interactions.
  • Understanding competing nonlinearities is crucial for controlling light propagation.
  • Quadratic nonlinear responses are fundamental in many optical phenomena.

Purpose of the Study:

  • To experimentally demonstrate competing focusing and defocusing nonlinearities.
  • To investigate the inhibition of nonlinear beam self-action in a specific optical system.
  • To analyze this inhibition under different beam diffraction conditions.

Main Methods:

  • Utilizing an array of coupled optical waveguides.
  • Employing periodically poled structures for quadratic nonlinear response.
  • Conducting experiments in both normal and anomalous beam diffraction regimes.

Main Results:

  • Experimental evidence of competing focusing and defocusing nonlinearities was observed.
  • Nonlinear beam self-action was inhibited, independent of optical power.
  • This inhibition effect was confirmed in both normal and anomalous diffraction scenarios.

Conclusions:

  • The study confirms the presence of competing nonlinearities in double-resonant systems.
  • Inhibition of nonlinear beam self-action is a robust phenomenon in this configuration.
  • Findings have implications for designing advanced optical devices and controlling light propagation.