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Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light
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Controlling the diffused nonlinear light generated in random materials.

Can Yao1, Francisco J Rodriguez, Jordi Martorell

  • 1ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain.

Optics Letters
|May 26, 2012
PubMed
Summary
This summary is machine-generated.

Researchers developed a wavefront shaping method for second-harmonic light in disordered nonlinear materials. This technique concentrates speckle generation into a single spot in strontium-barium niobate crystals.

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Area of Science:

  • Nonlinear optics
  • Materials science

Background:

  • Second-harmonic generation (SHG) in disordered nonlinear materials typically results in complex speckle patterns.
  • Controlling light propagation through complex media is a significant challenge in optics.

Purpose of the Study:

  • To demonstrate a method for controlling the spatial distribution of second-harmonic light generated in a disordered nonlinear material.
  • To concentrate the generated second-harmonic light into a single, controllable spot.

Main Methods:

  • Utilizing a spatial light modulator (SLM) to shape the wavefront of the fundamental laser beam.
  • Employing a transparent strontium-barium niobate crystal with a random distribution of antiparallel ferroelectric domains as the nonlinear medium.

Main Results:

  • Successfully shaped the wavefront of the fundamental beam to control the output SHG pattern.
  • Demonstrated the concentration of scattered second-harmonic light into a single focal spot.
  • Verified the effect in a specific disordered nonlinear crystal (strontium-barium niobate).

Conclusions:

  • Wavefront shaping of the fundamental beam offers effective control over SHG in disordered nonlinear media.
  • The developed method enables the focusing of scattered light, overcoming the limitations of random domain structures.
  • This technique has potential applications in nonlinear optics and imaging through scattering media.