An optical filter apparatus for processing an optical signal comprising a spectrum
broadening device for spectrally dividing one or more channels of the optical signal
into a discrete set of spectral components for each channel, a collector for collecting
the spectral components on a discrete number of corresponding light channels, one
or more processors for individually processing one or more of the spectral components
on the light channels, and a combiner for recombining the spectral components on
the light channels.
