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Related Experiment Videos

Cavity solitons in two-level lasers with dense amplifying medium.

V Ahufinger1, J García-Ojalvo, J Mompart

  • 1Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain.

Physical Review Letters
|October 4, 2003
PubMed
Summary

Local-field effects create bistability in optical systems. This study demonstrates that bistability and cavity solitons persist in broad-area lasers using Fourier filtering, enabling spatial light localization.

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Area of Science:

  • Nonlinear Optics
  • Laser Physics
  • Optical Cavities

Background:

  • Local-field effects are known to induce bistability in dense optical media.
  • Broad-area cavities present unique challenges for maintaining optical properties due to potential off-axis emission.

Purpose of the Study:

  • To theoretically investigate the preservation of bistability in broad-area optical cavities.
  • To explore the formation and properties of spatial light localization, specifically cavity solitons, in such systems.

Main Methods:

  • Theoretical examination of local-field effects in broad-area cavities.
  • Application of Fourier filtering to suppress off-axis emission.
  • Analysis of the resulting bistability and cavity soliton dynamics.

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Main Results:

  • Bistability between homogeneous lasing and nonlasing states is preserved in broad-area cavities.
  • Fourier filtering is crucial for maintaining this bistability by preventing off-axis emission.
  • Spatial light localization occurs in the form of cavity solitons, exhibiting significant plasticity with respect to the addressing beam.

Conclusions:

  • Broad-area lasers can sustain bistability and cavity solitons, offering a simplified platform for studying these phenomena.
  • The developed Fourier filtering technique is effective in enabling robust cavity soliton formation.
  • The plasticity of cavity solitons suggests potential for novel optical control and applications.