Dispersion compensation using a variable group-delaydispersion equaliser

Abstract
The effectiveness of a variable group-delay dispersion equaliser in compensating for the dispersions of various lengths of fibre is explained. The variable dispersion equaliser has a lattice-form programmable optical filter configuration and its dispersion can be varied from –681 to 786 ps/nm. The dispersion of three different fibres has been compensated for with a single equaliser.