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Polarisation-insensitive 640 Gbit/s demultiplexing is demonstrated using a 100 m polarisation-maintaining highly non-linear fibre. Error-free performance is achieved with only 0.2 dB polarisation dependence.
We report the first demonstration of error-free 640 Gbit/s time-division add-drop multiplexing, performed by nonlinear polarisation-rotation using a loop with a polarisation-maintaining HNLF.
We report on the first demonstration of 640 Gbit/s wavelength conversion by FWM. This is demonstrated using a novel elliptic core PM-HNLF giving sufficient FWM conversion bandwidth.
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