All-Optical Noninvasive Delayed Feedback Control of Semiconductor Lasers

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Springer Science & Business Media, Mar 15, 2013 - Technology & Engineering - 118 pages
The stabilization of unstable states hidden in the dynamics of a system, in particular the control of chaos, received much attention in the last years. In this work, a well-known control method called delayed feedback control is applied for the first time entirely in the all-optical domain. A multisection semiconductor laser receives optical feedback from an external Fabry-Perot interferometer. The control signal is a phase-tunable superposition of the laser signal, and provokes the laser to operate in an otherwise unstable periodic state with a period equal to the time delay. The control is noninvasive, because the reflected signal tends to zero when the target state is reached.
 

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Contents

1 Introduction
1
2 AllOptical Control Setup
9
3 Stable States with Resonant FabryPerot Feedback
31
4 Control of an Unstable Stationary State
43
5 Control of Unstable Selfpulsations
55
6 Controlling Chaos
64
7 Control of a Torsionfree Orbit
75
8 Conclusion
93
Appendix
95
Bibliography
107
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About the author (2013)

Dr. Sylvia Schikora completed her doctoral thesis on ultrafast noninvasive control of semiconductor lasers at the Department of Physics, Humboldt University of Berlin. She currently works at Humboldt University as a postdoctoral researcher with a focus on optical metrology.

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