Pulsing lasers with delayed optical feedback
23.06.2017
| Date | 23.06.2017 |
|---|---|
| Time | 11:00-12:30 |
| Place |
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| Speaker | Bernd Krauskopf |
| Area of expertise | Physics |
| Host | Dep. Physik |
| Contact | Keller |
| Abstract | Abstract: Semiconductor lasers with saturable absorber (SLSA) may produce trains of short pulses. In applications, such as clock generation and optical telecommunication, these need to be very regularly, and delayed optical feedback has been suggested as a control strategy to achi e ve this. From a mathematical perspective, such a system is described by delay differential equations. This class of sys tems features an infinite dimensional phase space, yet is still amenable to bifurcation analysis with advanced numerical tools. This allows one to map out regions in parameter space where different behavior can be found. As an example of the scope of this approach, we consider the Yamada model with delay, which is a system of three differential equations for the gain, the absorber and the intensity with incoherent delayed optical feedback. Our bifurcation analysis reveals an increasing complexity of feedbac k - induced dynamics, including multi - frequency oscillations and a large degree of multistability. Its predictive power for an experiment with a micropillar SLSA will be discussed. |