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Quantitative identification of dynamical transitions in a semiconductor laser with optical feedback
C Quintero-Quiroz1, J Tiana-Alsina1, J Romà1
1Universitat Politècnica de Catalunya, Departament de Física, Colom 11, 08222 Terrassa, Barcelona, Spain.
Scientific Reports
|November 19, 2016
Summary
Researchers developed analysis tools to detect transitions in semiconductor laser dynamics. These methods identify specific operating conditions for complex behaviors like low-frequency fluctuations and coherence collapse.
Area of Science:
- Nonlinear dynamics
- Semiconductor laser physics
- Complex systems analysis
Background:
- Identifying transitions to complex dynamical regimes is crucial for many applications.
- Semiconductor lasers with optical feedback serve as ideal systems for studying these transitions due to their diverse output signals.
Purpose of the Study:
- To develop and apply quantitative analysis tools for detecting dynamical transitions in semiconductor lasers.
- To identify operating conditions that lead to specific dynamical properties, such as low-frequency fluctuations and coherence collapse.
Main Methods:
- Application of three distinct analysis tools to quantify dynamical transitions.
- Systematic variation of laser pump current to induce and observe regime changes.
Main Results:
- Successfully detected the onset of two key dynamical regimes: low-frequency fluctuations and coherence collapse.
- Quantified the operating conditions associated with these transitions.
Conclusions:
- The developed analysis tools provide a quantitative method for characterizing dynamical transitions in semiconductor lasers.
- These tools are valuable for understanding and controlling laser output and can be applied to other complex systems.
