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Techniques for 640 Gbit/s optical signal processing are described, including demultiplexing, clock recovery, transmission, wavelength conversion, add-drop multiplexing, and timing-jitter tolerance. Demultiplexing at 1.28 Tbit/s is presented, with preliminary results for 1.28 Tbit/s transmission.
This paper will present recently identified and demonstrated key technologies for ultra-high-speed serial communications. Certain key components such as stabilised highly non-linear fibre switches, periodically poled Lithium Niobate devices and semiconductor optical amplifiers will be described with demonstrations of 640 Gb/s transmission, clock recovery, demultiplexing, add/drop, wavelength conversion...
We demonstrate error free, low-penalty demultiplexing of a 640 Gbit/s OTDM signal to 10 Gbit/s using a 5 cm long chalcogenide planar waveguide chip. Our approach exploits four-wave mixing by the instantaneous nonlinear response of chalcogenide.
We report on an experimental demonstration and optimization of cross-phase modulation-based wavelength conversion at 320 Gb/s assisted by Raman gain. Error free operation is demonstrated with low penalty.
We report on a demonstration of simultaneous 80 Gbit/s add-drop multiplexing in a non-linear optical loop mirror. Data pulses are actively dropped and added via cross-phase modulation by the same control pulse.
We demonstrate transmission of 16 WDM channels at 10 Gbit/s with 50 GHz channel spacing over 3 times 80 km NZDSF, with small OSNR penalty, using only a single Raman-pumped dispersion compensating module positioned before the receiver.
The principle of applying a pilot tone to an OTDM signal, in order to identify a specific channel, is presented. The impact on BER system performance is characterised as function of modulation index.
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