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Cavity solitons in vertical-cavity surface-emitting lasers.
A G Vladimirov1, A Pimenov2, S V Gurevich3
1Weierstrass Institute, Mohrenstrasse 39, 10117 Berlin, Germany Saint Petersburg State University, Faculty of Physics, St Petersburg, Russia vladimir@wias-berlin.de.
Summary
We demonstrate how delayed optical feedback can induce motion in stable light structures within nonlinear optical systems. This control method is shown to be effective in vertical-cavity surface-emitting lasers (VCSELs).
Area of Science:
- Nonlinear optics
- Optoelectronics
- Laser physics
Background:
- Localized structures (LSs) are stable light patterns in nonlinear optical systems.
- Controlling the motion of these LSs is crucial for optical device applications.
- Vertical-cavity surface-emitting lasers (VCSELs) are key components in optoelectronics.
Purpose of the Study:
- To investigate the control of localized structures (LSs) motion using delay feedback.
- To demonstrate the spontaneous motion of a stable LS in a VCSEL system.
- To analyze the influence of feedback phase and carrier lifetime on LS drift instability.
Main Methods:
- Experimental demonstration of LS appearance in a VCSEL.
- Theoretical investigation of LS self-mobility with time-delayed optical feedback.
- Analysis of the effects of feedback phase and carrier lifetime on LS dynamics.
Main Results:
- Delayed feedback induces spontaneous motion in stationary and stable LSs.
- Feedback phase and carrier lifetime significantly affect the space-time dynamics of 2D LSs.
- Analytical formulas derived for drift instability threshold and moving structure speed.
Conclusions:
- Delay feedback offers a method to control light structure motion in nonlinear optical systems.
- VCSELs provide an experimentally relevant platform for studying delay-induced LS dynamics.
- Understanding parameter effects is key to manipulating LS behavior for applications.
