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We propose a detailed frequency-domain model of the all-optical turbo-switch incorporating two cascaded semiconductor optical amplifiers (SOAs) with a broad band-pass optical filter in between the SOAs. The frequency-domain SOA model has taken the spatial inhomogeneity of the saturated SOA gain associated with the pump optical field into consideration for the first time. The simulations based on the...
The nonlinear dynamics of semiconductor optical amplifiers (SOAs) are investigated. We focus on the nonlinear gain, phase and chirp dynamics that can be used for high speed all-optical switching. Ultrafast component in the phase dynamics is observed. We explain this phenomenon by using a numerical model that includes the impact of sub-picosecond intra-band effects in the SOA. In addition, we also...
All-optical turbo-switches based on semiconductor optical amplifiers (SOAs) effectively increase the switching speed via shortening the overall recovery time of the carriers. The device is numerically simulated by time-domain and frequency-domain SOA models in order to understand its operation principle and the ultimate operation speed. An integrated turbo-switch is also proposed, where a phase adjustable...
We present an experimental and numerical investigation on phase dynamics in semiconductor optical amplifiers (SOAs). The experiment for measuring the phase recovery is carried out using an integrated SOA-based Mach-Zehnder interferometer switch, under the injection of 2 ps optical pump pulses at 10 GHz. The phase recovery is derived from the measured output of the interferometer. Ultrafast component...
We present results from theoretical analysis of the ultra-fast phase dynamics in semiconductor optical amplifiers in a numerical model. Furthermore, we explain the reason why a delay occurs between gain response and phase response.
We present all-optical wavelength conversion that can be used in the all-optical wavelength routing system. The wavelength conversion is capable of converting the same wavelength using a single semiconductor optical amplifier. Experimental proofs are presented.
A novel all-optical sampling based on nonlinear polarization rotation in a semiconductor optical amplifier is presented. An analog optical signal and an optical pulses train are injected into semiconductor optical amplifier simultaneously, and the analog light modulates the output optical pulse through controlling the rotated angle of nonlinear polarization rotation of the optical pulse. Therefore,...
We discuss high-speed optical signal processing for telecom applications. We focus on the optical wavelength conversion and self-clocking, respectively. In the optical wavelength conversion, we report 40 Gb/s wavelength conversion that is capable of converting the same wavelength using a single semiconductor optical amplifier. Experimental proofs are presented. In addition, we report a novel self-clocking...
We present a high-speed optical wavelength converter that is capable of converting the data to the same wavelength using a single semiconductor optical amplifier. Error-free wavelength conversion is demonstrated at a bit-rate of 40 Gb/s. The wavelength converter utilizes counter-propagation scheme assisted by blue-detuned optical filtering technology. The counter-propagation configuration eliminates...
Summary form only given. In this work, we numerically investigate the possibility of all-optical wavelength conversion at 1 Tb/s based on a single SOA and a Gaussian optical bandpass filter. A comprehensive model is employed to carry out the simulations for the carrier dynamics in an SOA. The ultrashort pulse propagation in an SOA is modeled through a nonlinear Schrodinger equation, which also accounts...
This paper presents a numerical optimization of an optical filter through a genetic algorithms (GA) in the context of high speed non-inverted wavelength conversion based on a single semiconductor optical amplifier (SOA). An optical filter is critical in the SOA-based wavelength converter because it enables high-speed operation through converting the ultra-fast chirp dynamics of the probe into useful...
This paper presents an experimental performance characterization of all-optical subsystems at 40 Gb/s using interconnected hybrid integrated all-optical semiconductor optical amplifier (SOA) Mach-Zehnder interferometer (MZI) gates and flip-flop prototypes. It was shown that optical gates can be treated as generic switching elements and, when efficiently interconnected, can form larger and more functional...
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