Abstract
A multi-section semiconductor laser is used to combine two fundamental phenomena observed so far only separately: excitability and chaotic transients [1]. Excitability means that the response of a system to external perturbations is " all" or " none" depending on whether the strength of the stimulus is above or below a critical threshold. Excitability is a paradigm in life sciences and fundamental for information processing in the brain. Excitable lasers could open new ways of information processing in optical networks. Chaotic transients, on the other hand, are long episodes of chaotic behavior which end eventually at an attractor that is usually not chaotic [1]. Lasers with such properties could be useful for chaotic communication. Semiconductor lasers with integrated optical feedback are excellent candidates to study such novel scenarios. The multi-section configuration enables us to tune feedback parameters in a wide range and to explore the phase space of the device in a systematic way [2].
© 2007 IEEE
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