Time-Domain Traveling Wave Model of Quantum Dot DFB Lasers

We present a time-domain traveling wave model for the simulation of InAs/GaAs quantum dot DFB lasers. The optical susceptibility of the quantum dot (QD) active material is represented through a series of numerical filters that account for the interplay between homogeneous and inhomogeneous broadenin...

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Bibliographic Details
Published in:IEEE journal of selected topics in quantum electronics 2011-09, Vol.17 (5), p.1318-1326
Main Authors: Gioannini, M., Rossetti, M.
Format: Article
Language:English
Subjects:
Charge carrier processes
Computer simulation
Distributed feedback laser
Dynamics
Equations
Gallium arsenide
InAs quantum dots (QDs)
Laser modes
Lasers
Mathematical model
Mathematical models
Modulation
Optical refraction
Optical variables control
Quantum dot lasers
Quantum dots
time-domain traveling wave (TDTW) model
transient and adiabatic chirp
Traveling waves
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Summary:We present a time-domain traveling wave model for the simulation of InAs/GaAs quantum dot DFB lasers. The optical susceptibility of the quantum dot (QD) active material is represented through a series of numerical filters that account for the interplay between homogeneous and inhomogeneous broadening of the gain spectrum of the self-assembled QDs. We also consider separate rate equations for electrons and holes for representing the different dynamics of carriers in the conduction and the valence band. We present examples of simulation results focusing in particular on the dynamic properties of the laser (modulation bandwidth, nonreturn-to-zero direct modulation, chirp, α-parameter, etc.) with the purpose of comparing these simulation results with the experimental ones found in the literature.
ISSN:1077-260X
1558-4542
DOI:10.1109/JSTQE.2011.2128857