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Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

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Related Experiment Video

Updated: Jul 5, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

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Published on: November 30, 2012

Could cavity solitons exist in bidirectional ring lasers?

L Columbo1, L Gil, J Tredicce

  • 1Institut du Non Linéaire de Nice (U.M.R. C.N.R.S 6618), Université de Nice Sophia Antipolis, 1361 Route des Lucioles, F-06560 Valbonne, France.

Optics Letters
|May 3, 2008
PubMed
Summary
This summary is machine-generated.

Bright and dark cavity solitons are achievable in ring lasers only when phase invariance is broken. This overcomes phase waves that disrupt localized structures, enabling genuine cavity solitons.

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Area of Science:

  • Nonlinear optics
  • Laser physics
  • Theoretical physics

Background:

  • Bidirectional ring lasers can support localized structures known as cavity solitons.
  • Phase invariance in the electromagnetic field typically leads to phase waves.
  • Phase waves can mediate long-range interactions, disrupting the independence of localized structures.

Purpose of the Study:

  • To investigate the conditions for obtaining bright and dark cavity solitons in bidirectional class A ring lasers.
  • To understand the role of phase invariance in the formation and stability of cavity solitons.
  • To develop an improved theoretical model for describing these laser systems.

Main Methods:

  • Numerical simulations of a bidirectional class A ring laser model.
  • Mathematical analysis of the laser model to identify conditions for soliton formation.
  • Modification of the standard laser model to account for broken phase invariance.

Main Results:

  • Bright and dark cavity solitons are numerically demonstrated.
  • Breaking phase invariance is shown to be a necessary condition for obtaining these solitons.
  • The improved model successfully predicts the existence of genuine cavity solitons.

Conclusions:

  • Phase invariance breaking is crucial for achieving independent bright and dark cavity solitons in ring lasers.
  • Eliminating phase waves through broken phase invariance allows for stable localized structures.
  • The enhanced laser model provides a more accurate description of cavity soliton dynamics.