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Related Experiment Videos

Waveguiding effects in self-pulsing vertical-cavity surface-emitting lasers.

Guy Van der Sande1, Krassimir Panajotov, Michael Peeters

  • 1Department of Applied Physics and Photonics, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium. guy.van.der.sande@vub.ac.be

Optics Letters
|January 15, 2004
PubMed
Summary

We discovered a new mechanism for self-pulsing in vertical-cavity lasers, driven by waveguiding effects, not saturable absorbers. This finding aligns with existing experimental data.

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Area of Science:

  • Optics and Photonics
  • Semiconductor Device Physics

Background:

  • Self-pulsing is a known phenomenon in semiconductor lasers with saturable absorbers.
  • Vertical-cavity surface-emitting lasers (VCSELs) are crucial components in optical communications and sensing.

Purpose of the Study:

  • To propose and investigate an alternative mechanism for self-pulsing in VCSELs.
  • To identify the specific conditions under which waveguiding effects induce self-pulsing in VCSELs.

Main Methods:

  • Theoretical modeling of VCSELs incorporating waveguiding effects.
  • Numerical simulations to analyze laser dynamics.
  • Comparison of theoretical and numerical results with experimental data.

Main Results:

Related Experiment Videos

  • Identified waveguiding effects as a novel mechanism for self-pulsing in VCSELs.
  • Determined the critical conditions for self-pulsing to occur due to waveguiding.
  • Theoretical predictions were validated by experimental observations.

    • Conclusions:

    • Waveguiding effects offer an alternative explanation for self-pulsing in VCSELs.
    • The study provides a deeper understanding of VCSEL dynamics.
    • Results are consistent with experimental findings, enhancing confidence in the proposed mechanism.