Dynamics of Quantum Dot Laser with Direct Current Injection Density Modulation


  • Mushtaq O. Oleiwi 2 Physics Department, Education College for Pure Sciences, Thi-Qar University, Thi-Qar, Iraq.
  • Ali Chkheam Qar –Qar Province, Thi –General Directorate of Education Thi
  • Sadeq Kh. Ajeel 3 Physics Department, Sciences College, Thi-Qar University Thi-Qar, Iraq.


Quantum dot laser, Injection current modulation, Dynamics.


In this work, the dynamics of quantum dot laser are studied. Turn on dynamics with increasing the injection current density leads to increase the laser output and carriers in quantum dot level. The system under the effect of direct current modulation appears various dynamics with variation of control parameters of modulation (m, b, fm). The scenario will be finished in the steady state to periodic, chaotic and spiking behavior with increasing the modulation frequency and return to steady state. Carriers are increasing in wetting layer with increasing the temperature


V.R. Vukkalam,"Spatial Profiling of Quantum Dot Lasers", Waterford Institute of Technology,

Ireland, (2012).

''Nonlinear laser dynamics '', Ed.K. Ludge, Wiley –VCH Verlag GmBH and Co. KGaA, Germany


M. Pelton, An efficient source of single photons: A single quantum dot in a microcavity, PhD thesis,

Stanford University, (2002).

M. Kuntz "Modulated InGaAs/GaAs Quantum Dot Lasers", Diplom-Physiker, Berlin, Berlin (2006).

S. Rajesh, Nonlinear Dynamics of Semiconductor Lasers: Control and Synchronization of Chaos,

Cochin University of Science and Technology, India, (2005).

C. Y. Lin, F. Grillot, N. A. Naderi, Y. Li, and L. F. Lester, “RF Linewidth Reduction in a Quantum

Dot Passively ModeLocked Laser Subject to External Optical Feedback,” Applied Physics Letters, Vol.

, No. 5, pp. 051118, (2010).

S. Rajesh, Nonlinear dynamics of semiconductor lasers: Control and synchronization of chaos PhD

thesis, Cochin University of Science and Technology, India (2005).

D. O’Brien, S. P. Hegarty, G. Huyet, J. G. McInerney, T. Kettler, M. Laemmlin, D. Bimberg, V. M.

Ustinov, A. E. Zhukov, S. S. Mikhrin, and A. R. Kovsh, Electron. Lett. 39, 1819 (2003).

P. U. Jijo, Nonlinear dynamics of multiple quantum well lasers: Chaos and multistability, Cochin

university of science and Technology, India, (2005).

S. Rajesh and V.M. Nandakumaran, Control of bistability in a direct modulated Semiconductor laser

using delay optoelectronic feedback, Physica D, 213,113-120, (2006).

B. Lingnau and K. Ludge ''Analytic Characterization of the Dynamic Regimes of Quantum Dot

Lasers'' photonics. 2, 402-413, (2015).

M. O. Oleiwi, theoretical study on linear and nonlinear, PhD thesis, Basrah Univ. (2014).