Patent ID: 6295396
Filing Date: 2001-09-25
Classification: G02B

Abstract:
An optical arrangement for providing optical dispersion slope compensation to a received dispersion distorted input signal comprising N.times.M wavelength multiplexed channels, the arrangement comprising:a plurality of fiber Bragg gratings (FBGs) serially coupled along an optical fiber, each of the plurality of FBGs being arranged to reflect a separate one of N groups of the MxN wavelength multiplexed channels back along the optical fiber for providing a dispersion slope compensating value to each of the N groups of the M.times.N wavelength multiplexed channels;a major dispersion compensating fiber (DCF) for providing a predetermined chromatic dispersion correction value to the N.times.M wavelength multiplexed channels, the combination of the dispersion compensation values provided by the plurality of FBGs and the dispersion correction values provided by the major DCF being used to generate a dispersion slope compensated output signal wherein a residual dispersion for the N groups of wavelength channels after propagating through the major DCF has a linear slope and a first one of the N groups of wavelength channels has a zero dispersion value after reflection by a first FBG; andfirst directing means for directing the N.times.M wavelength multiplexed channels to and from the plurality of FBGs and for directing the N.times.M wavelength multiplexed channels to or from the major DCF.