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Summary

We numerically analyzed a semiconductor laser model, revealing complex bifurcations that cause asymmetric output. The filter

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Area of Science:

  • Physics
  • Optical Engineering
  • Nonlinear Dynamics

Background:

  • Semiconductor lasers are crucial for modern optics.
  • Understanding their output characteristics is key for applications.
  • Intracavity filters can modify laser dynamics.

Purpose of the Study:

  • To numerically analyze a delay differential equation model of a short-cavity semiconductor laser.
  • To investigate the role of an intracavity frequency-swept filter on laser output.
  • To reveal the complex bifurcation structure causing output asymmetry.

Main Methods:

  • Numerical analysis of a delay differential equation model.
  • Simulation of a short-cavity semiconductor laser with an intracavity frequency-swept filter.
  • Examination of bifurcation structures and output characteristics.

Main Results:

  • A complex bifurcation structure was revealed.
  • This structure is responsible for the asymmetry in laser output characteristics.
  • Two distinct bursting cycles were identified, dependent on the filter's frequency sweep direction.
  • These cycles originate from different parts of the continuous-wave solution branch.

Conclusions:

  • The frequency sweep direction of an intracavity filter significantly impacts semiconductor laser dynamics.
  • Complex bifurcations in laser models can lead to asymmetric output.
  • The study provides insights into controlling and understanding laser behavior for improved performance.