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Bifurcation to polarization self-modulation in vertical-cavity surface-emitting lasers
Optics Letters
|November 17, 2007
Summary
Polarization self-modulation in vertical-cavity surface-emitting lasers (VCSELs) arises from a Hopf bifurcation. This mechanism explains observed complex outputs and predicts new bifurcations based on laser feedback parameters.
Area of Science:
- Optics and Photonics
- Laser Physics
- Nonlinear Dynamics
Background:
- Vertical-cavity surface-emitting lasers (VCSELs) exhibit polarization self-modulation under specific optical feedback conditions.
- Previous numerical simulations have observed this phenomenon, but a theoretical explanation for its bifurcation has been lacking.
Purpose of the Study:
- To elucidate the underlying bifurcation mechanism responsible for polarization self-modulation in VCSELs.
- To analyze the influence of laser feedback parameters on the observed bifurcations.
Main Methods:
- Theoretical analysis of polarization self-modulation in VCSELs.
- Investigation of Hopf bifurcation mechanisms in laser systems.
- Parameter analysis based on optical feedback characteristics.
Main Results:
- Demonstrated that polarization self-modulation in VCSELs originates from a Hopf bifurcation.
- Established a clear link between laser feedback parameters and the occurrence of this bifurcation.
- Predicted the existence of additional bifurcations at lower feedback rates.
Conclusions:
- The Hopf bifurcation mechanism provides a comprehensive explanation for polarization self-modulation in VCSELs.
- Understanding these bifurcations is crucial for controlling and predicting VCSEL output dynamics.
- The findings offer insights into the complex behavior of semiconductor lasers with optical feedback.
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