Articles written in Pramana – Journal of Physics
Volume 96 All articles Published: 11 August 2022 Article ID 0151 Research Article
Effects of two-tone intensity modulation on signal distortion and noise in a semiconductor laser for radio-over-fibre applications
YASMIN ABD EL-SALAM TAREK MOHAMED ALAA MAHMOUD
This paper introduces modelling and simulation of signal distortions as well as intensity noise induced by two-tone direct intensity modulation
of semiconductor lasers for use in radio-over-fibre (RoF) systems. The study develops a large-signal modulation of semiconductor laser simulations in the regime
of high-frequency modulation by counting lasers with high modulation bandwidth. The temporal and spectral characteristics of the modulated laser output are investigated.
The temporal characteristics include the fluctuations in the modulated signal waveforms, while the spectral characteristics include the frequency spectrum of the modulation response,
second-order harmonic distortion (HD2) and second- and third-order intermodulation distortions, IMD2 and IMD3, respectively, as wellas the relative intensity noise (RIN).
The investigations are performed under three bias currents
Volume 97, 2023
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