Investigation of 640 Gbit/s (16 channel×42.7 Gbit/s) dispersion-shifted fibre (DSF) 100 km L-band transmission using the slope compensator in the receiver shows that all 16 channels are transmitted with the compensator. A 25 nm bandwidth dispersion slope compensator comprising of an arrayed waveguide grating (AWG) and a spatial phase filter are used. A dispersion compensation fibre (DCF) that can exactly compensate the dispersion slope and the dispersion of DSF in L-band is also used. Results show that 25 nm bandwidth dispersion and dispersion slope compensation in L-band DSF can be achieved in 640 Gbit/s wavelength division multiplexing (WDM) configuration.
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