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Nonlinear polarization dynamics in directly modulated vertical-cavity surface-emitting lasers.
M Sciamanna1, A Valle, P Mégret
1Service d'Electromagnétisme et de Télécommunications, Faculté Polytechnique de Mons, Boulevard Dolez 31, B-7000 Mons, Belgium.
Summary
This study reveals complex nonlinear dynamics in current-modulated vertical-cavity lasers. Researchers observed both periodic and chaotic behaviors in the laser
Area of Science:
- Optics and Photonics
- Nonlinear Dynamics
- Semiconductor Lasers
Background:
- Vertical-cavity surface-emitting lasers (VCSELs) are crucial semiconductor devices.
- Understanding their nonlinear dynamics is key for advanced applications.
- VCSELs exhibit complex behaviors under current modulation.
Purpose of the Study:
- Investigate nonlinear dynamics in current-modulated VCSELs.
- Analyze the behavior of two orthogonal linearly polarized (LP) fundamental transverse modes.
- Characterize the conditions leading to periodic and chaotic dynamics.
Main Methods:
- Utilized current modulation on a VCSEL.
- Analyzed the intensities of the two orthogonal LP fundamental transverse modes.
- Identified and characterized time-periodic and chaotic regimes.
Main Results:
- Observed in-phase time-periodic dynamics in the two LP modes.
- Discovered chaotic regimes with combined in-phase and antiphase dynamics.
- Chaotic dynamics were prevalent across a wide range of laser and modulation parameters.
Conclusions:
- Current modulation induces complex nonlinear dynamics in VCSELs.
- The interplay between orthogonal LP modes can lead to rich dynamical behaviors.
- Chaotic dynamics are a significant feature in modulated VCSELs.