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Simulations using a microscopic, nonequilibrium, semiconductor laser model show that the long-established α-factor concept breaks down in quantum-dot lasers, especially under complex dynamic scenarios, such found during high-excitation or optical-injection operations.
The four-wave mixing (FWM) analysis is successfully applied on the injection-locked quantum dot (QD) laser for linewidth enhancement factor extraction. The rate equation model of the QD lasers is simplified and the analytical model for the FWM analysis is derived and verified. By fitting the experimentally obtained regenerative signals and power spectrum signals at different detuning frequencies with...
We compare the accuracy of recently-published closed-form expressions for the nonlinear noise in coherent PDM-QPSK and PDM-16QAM optical systems without in-line chromatic dispersion compensation against the numerical solution of the vector nonlinear Schrödinger equation and show their limitations.
Experimental demonstrations of ring resonators with TiO2 cores are presented and measured with −2.9pm/K resonance shift. Their thermo-stress-optic behavior was found to be important to their function; therefore an inclusive model is presented and simulated numerically.
Vertical cavity surface emitting lasers (VCSELs) are an important light source for applications in communication and appliances consumer use. However, the types of III-V semiconductor materials that can be used to manufacture monolithic VCSELs are limited to only few choices. Moreover, limitations of the device materials will also limit the functionality of VCSELs incorporated into microsystems. Various...
We develop robust computational methods that can rapidly determine the existence and stability of pulses in passively modelocked laser systems over a broad parameter range. We apply these methods to laser systems with several different models of fast saturable absorption.
We apply this general approach to a novel high-performance two-chemistry photopolymer. After independently obtaining all model parameters, we validate the entire model by testing it in different regimes. First, we study the effect of monomer species and loading on M/# to test the capability of the model, derived only from weak consumption measurements, to the complete consumption of monomer. Second,...
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