Composite-cavity and delayed feedback semiconductor laser instabilities.
AuthorRose, Michael Harold.
Committee ChairSargent, Murray, III
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PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractThis dissertation studies instabilities in semiconductor lasers with external feedback using two distinct models. The first model considers composite-cavity modes and assumes a perfectly reflecting external mirror. It is found that tiny displacements of the external mirror cause an instability which results in a mode-hopping phenomenon. These displacements induce relaxation oscillations in the laser output which might be interpreted as chaos. The second model assumes delayed feedback from a distant reflector. The delay-differential equations that typically describe this model are reduced to a two-dimensional map model that shows intermittency in the transition to chaos. The map is generalized to a multidimensional model. The generalized mapping exhibits chaotic pulsations and a collapse to equilibrium which are reminiscent of feedback experiments.
Degree ProgramOptical Sciences