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RSS FeedsEntropy, Vol. 20, Pages 789: Alternation of Defects and Phase Turbulence Induces Extreme Events in an eXtended Microcavity Laser (Entropy)

 
 

15 october 2018 16:00:06

 
Entropy, Vol. 20, Pages 789: Alternation of Defects and Phase Turbulence Induces Extreme Events in an eXtended Microcavity Laser (Entropy)
 




Out-of-equilibrium systems exhibit complex spatiotemporal behaviors when they present a secondary bifurcation to an oscillatory instability. Here, we investigate the complex dynamics shown by a pulsing regime in an extended, one-dimensional semiconductor microcavity laser whose cavity is composed by integrated gain and saturable absorber media. This system is known to give rise experimentally and theoretically to extreme events characterized by rare and high amplitude optical pulses following the onset of spatiotemporal chaos. Based on a theoretical model, we reveal a dynamical behavior characterized by the chaotic alternation of phase and amplitude turbulence. The highest amplitude pulses, i.e., the extreme events, are observed in the phase turbulence zones. This chaotic alternation behavior between different turbulent regimes is at contrast to what is usually observed in a generic amplitude equation model such as the Ginzburg–Landau model. Hence, these regimes provide some insight into the poorly known properties of the complex spatiotemporal dynamics exhibited by secondary instabilities of an Andronov–Hopf bifurcation.


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47 viewsCategory: Informatics, Physics
 
Entropy, Vol. 20, Pages 770: Operating Range for a Combined, Building-Scale Liquid Air Energy Storage and Expansion System: Energy and Exergy Analysis (Entropy)
Entropy, Vol. 20, Pages 788: A Fast Feature Selection Algorithm by Accelerating Computation of Fuzzy Rough Set-Based Information Entropy (Entropy)
 
 
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