Four wavelength dispersion compensation over 125 km of single mode optical fibre at 10 Gbs/sup -1/ using multiple in-line step-chirped gratings

Simultaneous dispersion compensation for 4 wavelengths, each at 10 Gbs/sup -1/, is demonstrated over 125 km of optical fibre in the 1550 nm window using four 100 mm long step-chirped fibre gratings, apodised by a simple novel technique.