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.
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Takiguchi et al. (1995) studied this question.
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