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Semiconductor Optical Amplifiers (SOAs) may be designed as linear or nonlinear network elements. We report on recent results that indicate advantageous characteristics for QD SOAs as linear and bulk SOA as nonlinear network elements.
The nonlinear operation regimes of quantum-dot semiconductor optical amplifiers (QD-SOAs) are investigated and the ideal filter providing the best all-optical wavelength conversion efficiency is derived theoretically. Results are confirmed by experiments with Q2-factors amounting to 16 dB.
In this paper we discuss filtering schemes for performing wavelength conversion with QD-SOA. We identify that the selection of the optimum filter depends on the operating regimes of the nonlinear device. Experimental implementations of the proposed schemes demonstrate efficient wavelength conversion with high quality factors.
High-quality all-optical wavelength conversion is demonstrated with a single QD-SOA followed by a filter. The operation regimes of QD-SOA are identified. It is shown that different filter schemes are needed for the respective regimes.
In this paper we introduce an interferometric configuration for performing wavelength conversion in nonlinear media with limited cross-phase modulation nonlinearity. Through numerical analysis we explore its regenerative properties. The proposed scheme is experimentally validated at 40 Gb/s using a QD-SOA as nonlinear medium. It is shown that the extinction ratio of the cross gain modulated signal...
Interferometric schemes based on the cross-phase modulation properties of nonlinear devices have been widely used to develop high performance signal processing subsystems, such as wavelength converters and regenerators. However, there is also another category of devices characterized by limited cross-phase modulation nonlinearity. In this category belong quantum dot semiconductor optical amplifiers,...
We introduce and verify experimentally an interferometric scheme for performing cross-gain modulation. The scheme is used to demonstrate all-optical wavelength conversion with good extinction ratio in media with little or no cross-phase modulation nonlinearity.
A new modular SOA-based integrated interferometer is presented: 40 Gb/s standard mode wavelength conversion is performed on the C-band with the 2-SOA's device, while 8 dB input power dynamic range is shown with the 4-SOA's version
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