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Two-mode injection locking in vertical-cavity surface-emitting lasers.

M Sciamanna1, K Panajotov

  • 1Supélec and Laboratoire Matériaux Optiques, Photonique et Systèmes, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7132, Université de Metz, 2 Rue Edouard Belin, F-57070 Metz, France. marc.sciamanna@metz.supelec.fr

Optics Letters
|November 11, 2005
PubMed
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Orthogonal optical injection into vertical-cavity surface-emitting lasers (VCSELs) induces complex dynamics, including bifurcations to steady states and chaotic behavior. A key finding is the two-mode injection-locking solution, revealing novel bistability mechanisms.

Area of Science:

  • Optics and Photonics
  • Nonlinear Dynamics
  • Semiconductor Lasers

Background:

  • Vertical-cavity surface-emitting lasers (VCSELs) are fundamental optoelectronic devices.
  • Polarization dynamics in VCSELs are crucial for various applications.
  • Optical injection is a common technique to control laser behavior.

Purpose of the Study:

  • To investigate the polarization switching dynamics in a VCSEL under orthogonal optical injection.
  • To analyze the bifurcations and complex dynamics arising from varying injection strength.
  • To identify and characterize novel bistability mechanisms.

Main Methods:

  • Experimental setup involving a VCSEL subjected to orthogonally polarized optical injection.
  • Systematic variation of optical injection strength.

Related Experiment Videos

  • Analysis of polarization states and dynamic regimes using optical spectrum analyzers and time-resolved measurements.
  • Theoretical stability analysis of the underlying rate equations.

    • Main Results:

    • Observed polarization switching induced by orthogonal optical injection.
    • VCSEL bifurcates to injection-locked steady states, time-periodic, and potentially chaotic dynamics with increasing injection strength.
    • Identified a two-mode injection-locking solution where both VCSEL polarization modes are locked.
    • Detailed stability analysis revealed new bistability mechanisms in optical injection scenarios.

    Conclusions:

    • Orthogonal optical injection offers a versatile method to control VCSEL polarization dynamics.
    • The study reveals complex dynamic behaviors, including chaos, driven by injection parameters.
    • The discovered two-mode injection-locking and associated bistability mechanisms offer new insights into optical injection phenomena in lasers.