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We demonstrate a tunable optical delay element using wavelength conversion in a highly nonlinear fiber, dispersion compensating fiber, and optical phase conjugation. A continuous delay of up to 1.16-μs equaling >55,000 symbols at 50 Gb/s, for 100 Gb/s NRZ-DQPSK and 50 Gb/s NRZ-DPSK modulation formats, is demonstrated.
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,...
This paper assesses the performance of a wavelength converter based on cross-gain modulation in quantum-dot semiconductor optical amplifiers in an interferometer. Patterning-effect free wavelength conversion is achieved with no extinction ratio degradation at 160 Gbit/s.
This paper presents simulation results of the performance of a 160 Gbit/s 2R regenerator based on Quantum-Dot Semiconductor Optical Amplifiers (QD-SOA). The ultra-fast speed of this device is due to the large Cross-Gain Modulation (XGM) bandwidth of QD-SOAs. A Mach-Zehnder Interferometer (MZI) configuration is used to obtain a non-inverted output signal. Wavelength conversion and 2R (Re-amplifying,...
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