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Performances and Effects for Quantum Dot Laser (QDL) Investigation under Optical Feedback |
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PP: 81-85 |
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doi:10.18576/ijtfst/140202
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Author(s) |
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Ahmed A. Hashim,
Mushtaq O. Oleiwi,
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Abstract |
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| In this study, we investigate the influence of external optical feedback on laser output and carrier density. It is observed that the impact of optical feedback intensifies as the length of the external cavity is reduced. The system of rate equations is solved using Matlab software (dde23), incorporating initial conditions for photon intensity, carrier density, and phase. A reduction in the external cavity length leads to the emergence of multimode (chaotic behavior) output in the laser, as evidenced by the fast Fourier Transform. Analyzing these fluctuations through the Fast Fourier Transform reveals a spectrum of behavioral patterns. Various methodologies, including time series analysis, fast Fourier transform, and phase space with attractors, are employed to assess the dynamics of laser output. The dynamics are evaluated using time series data of output intensities or power, as well as three-dimensional phase space representations.
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