Comparison of the Behavior of Semiconductor Lasers under the Influence of Changing Bias Current with Optoelectronic Feedback

Authors

Tareq A. Al Attabi, Department of Physics, College of Sciences, University of Thi-Qar, Thi-Qar, Iraq AND University of Sumer, Rifai 66001, IraqFollow
Salam Jasim Majeed, Department of Mathematics, College of Computer Science and Mathematics, University of Thi-Qar, Thi-Qar, Iraq
Muwaffaq Abdullah, University of Sumer, Rifai 66001, Iraq

Abstract

Direct pump modulation is one feature of semiconductor lasers that sets them apart from other types of lasers. Another degree of flexibility is the injection current disruption. Consequently, instabilities are caused by the disruption of the injection current in semiconductor lasers, and the modulation of the injection current does in fact show instabilities and chaotic behaviors. This research investigates a comparative study between conventional and nanoscale semiconductor lasers. The occurrence of different laser outputs from both types of semiconductor lasers, including the typical output from these devices as well as periodic, multi-periodic, aperiodic, and chaotic ones that arise from injection current, were examined. We discovered a variety of optical intensity oscillation dynamics, including chaos oscillations; limit cycles, and quasi-periodic oscillations. Time series and their extracted FFT power spectrums, phase diagrams (attractors), and inter-spike intervals (ISI) through examine these dynamics.

Recommended Citation

Attabi, Tareq A. Al; Majeed, Salam Jasim; and Abdullah, Muwaffaq (2025) "Comparison of the Behavior of Semiconductor Lasers under the Influence of Changing Bias Current with Optoelectronic Feedback," AUIQ Conference Proceedings: Vol. 1: Iss. 1, Article 8.
DOI: https://doi.org/10.70176/3107-2682.1007
Available at: https://acp.alayen.edu.iq/journal/vol1/iss1/8