Journal ArticleDOI
Influence of sinusoidal modulation on mode competition and signal distortion in multimode InGaAsP lasers
Ahmed Bakry,Moustafa Ahmed +1 more
TLDR
In this paper, the influence of large-signal modulation on mode oscillation in InGaAsP/InP lasers was investigated in terms of the temporal trajectories of the total output and the strongest modes as well as their Fourier spectra.Abstract:
This paper investigates influence of large-signal modulation on mode oscillation in InGaAsP/InP lasers. The mode competition dynamics under modulation are examined in terms of the temporal trajectories of the total output and the strongest modes as well as their Fourier spectra. The mode coupling induced by the strong spectral gain suppression is evaluated by both the correlation coefficients among the strongest modes and their signal distortion. We show that small and moderate modulations at the multimode hopping of the laser modulate the mode hopping along with modulation of each mode. The mode coupling is characterized by anti-correlation among the modes like as the non-modulated laser. Under modulation with the resonance frequency, the increase in the modulation depth changes mode coupling from anti-correlation to positive correlation and then to complete coupling that correspond to emission of periodic pulses. The mode coupling is characterized by mode competition distortion, which measures the amount of power carried by the mode signal at the frequency of multimode-hopping.read more
Citations
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Longitudinal Mode Competition and Asymmetric Gain Saturation in Semiconductor Injection Lasers. II. Theory : Waves, Optics and Quantum Electronics
Nagaatsu Ogasawara,Ryoichi Ito +1 more
Journal ArticleDOI
Harmonic and intermodulation distortions and noise associated with two-tone modulation of high-speed semiconductor lasers
Ahmed H. Bakry,Moustafa Ahmed +1 more
TL;DR: In this paper, the authors present results of modeling and simulation of the harmonic and intermodulation distortions as well as the intensity noise of high-speed semiconductor lasers under two-tone modulation.
Journal ArticleDOI
Multimode analysis of relative intensity noise associated with intensity modulation of semiconductor lasers
Ahmed Bakry,Moustafa Ahmed +1 more
TL;DR: In this article, the relative intensity noise (RIN) associated with intensity modulation (IM) of multilongitudinal mode semiconductor lasers was analyzed, and the effect of the modulation parameters on both the total and modal RIN between both modalities was analyzed.
Journal ArticleDOI
Mode-competition noise associated with microwave modulation of multimode semiconductor lasers
TL;DR: In this paper, the authors analyzed the mode-competition (MC) phenomenon and the associated noise in multimode semiconductor lasers at microwave modulation, and they showed that an increase in the modulation depth changes the mode coupling from anticorrelation to positive correlation and then to complete coupling, which corresponds to emission of periodic pulses.
Journal ArticleDOI
Direct Modulation Performance of Quantum Well Semiconductor Laser Diodes Operating in Multimode
TL;DR: In this article , a model of multimode rate equations is developed by taking into account both symmetric and asymmetric cross-gain saturation, and the mode partition effect exists in both the modulated and unmodulated LDs.
References
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Journal ArticleDOI
Quantum‐well infrared photodetectors
TL;DR: The literature on quantum-well infrared photodetectors (QWIPs) is reviewed in this paper, where a detailed discussion is given on the device physics of the intersubband absorption and hot-carrier transport processes for individual detectors, as well as the high performance which has been achieved for large staring arrays.
Book
Optical Fiber Communications
TL;DR: The concept of WDM combined with optical amplifiers has resulted in communication links that allow rapid communications between users in countries all over the world as discussed by the authors, which is known as wavelength division multiplexing (WDM).
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Ultimate low-loss single-mode fibre at 1.55 μm
TL;DR: In this article, a very low loss singlemode fiber with a minimum loss of 0.20 dB/km at a wavelength of 1.55 μm is attained; this loss reaches the ultimate lower loss limit of silica-based optical glass fibre.
Journal ArticleDOI
Zero material dispersion in optical fibres
David N. Payne,W.A. Gambling +1 more
TL;DR: The material dispersion of optical fibres having cores of silica or phosphosilicate glass falls to zero at a wavelength between 1.2 and 1.3 µm as mentioned in this paper.
Book
Optical Fiber Communication Systems
TL;DR: The Communications Toolbox as discussed by the authors is a collection of tools for the analysis of binary optical communication systems, including basic optical fiber communications components and their application in signal detection. But it is not suitable for long-distance communication.