Medical Applications and Role of Stability on Quantum Dot Semiconductor Lasers with Positive and Negative Optoelectronics Ali Rajaa Hussein Abd1, Ghalib Basim Abdullattif2,*, Abdoon Rabab Saadoon3 1Physics Department, Science College, University of Kerbala, Karbala, Iraq 2Laser Physics Department, Science College for Women 3Physics Department, Science College, University of Babylon, Babylon, Iraq *Corresponding Author: Basim Abdullattif Ghalib, Laser Physics Department, Science College for Women, University of Babylon, Babylon, Iraq, Basim2882004@yahoo.com
Online published on 23 December, 2019. Abstract Many applications are depending on the nonlinear dynamics of quantum dot semiconductor laser QDSL. In this study, the QDSL dynamics of a theoretical model including positive and negative optoelectronic feedback (OEF) are studied. Then deal with the density of photons and parameters affecting on OEF by using rate equations at constant value of time delay with positive and negative Optoelectronic feedback parts at. A series of stable pulses are obtained in the majority of the results with some mutations or spike during periods of time and the appearance of the chaos. This stable behavior only emerged with a time of (t = 110ps) and that results are importance significant in applications of medical lasers. Top Keywords Stability of quantum dot, Quantum Dot, optoelectronics feedback. Top |