Homoclinic chaos by optoelectronic feedback in semiconductor devices : a modeling approach
Other Title(s)
نموذج تقريبي لتوليد الشواش المتناظر بواسطة إعادة التيار الكهروضوئي في شبه الموصل
Dissertant
Thesis advisor
Bassam, Sudud Salman Ahmad
al-Nuaymi, Qays Abd al-Sattar Muhammad Amin
University
University of Baghdad
Faculty
College of Science
Department
Department of Physics
University Country
Iraq
Degree
Master
Degree Date
2013
English Abstract
In the present work, we study the existence of slow chaotic spiking sequences in the dynamics of semiconductor laser with ac-coupled optoelectronic feedback (photocurrent injected to the semiconductor laser) and the corresponding Fast Fourier Transformation (FFT), and attractor.
The introduction of an ac-feedback optoelectronic loop adds both a third degree of freedom and a much slower time-scale.
The dimensionless differential equations which describe this model is achieved where the solitary laser dynamics is ruled by two coupled variables (intensity and population inversion) evolving with two very different characteristic time-scales.
The transitions from steady state to periodic, period doubling, chaotic, and Mixed Mode Oscillations (MMOs) states are observed by varying dc-bias current and feedback strength, which could be produced by a map.
The bifurcation and bistability, observed by modulation of this transitions, have been showed by our model.
MMOs can be ordered in periodic-chaotic sequences, in which intervals of periodic states are separated by chaotic states which can be plotted of a suitably defined winding number (R).
The chaotic spiking regime can be understood in terms of excitability of chaotic attractor.
The excitable behavior is observed also on each of the periodic attractors within the period-doubling cascade leading to chaos.
Main Subjects
Topics
No. of Pages
106
Table of Contents
Table of contents.
Abstract.
Abstract in Arabic.
Chapter One : Introduction and basic concepts.
Chapter Two : Theory and technique.
Chapter Three : Results, discussion and conclusion.
References.
American Psychological Association (APA)
Nasir, Haydar Ayid. (2013). Homoclinic chaos by optoelectronic feedback in semiconductor devices : a modeling approach. (Master's theses Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-607060
Modern Language Association (MLA)
Nasir, Haydar Ayid. Homoclinic chaos by optoelectronic feedback in semiconductor devices : a modeling approach. (Master's theses Theses and Dissertations Master). University of Baghdad. (2013).
https://search.emarefa.net/detail/BIM-607060
American Medical Association (AMA)
Nasir, Haydar Ayid. (2013). Homoclinic chaos by optoelectronic feedback in semiconductor devices : a modeling approach. (Master's theses Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-607060
Language
English
Data Type
Arab Theses
Record ID
BIM-607060
