Intra-channel equalizing optical interleaver

Details Intra-channel equalizing optical interleaver Intra-channel equalizing optical interleaver

2008-05-29

2011-11-22

Li, Shi K (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S079000, C398S082000

Reexamination Certificate

active

08064768

ABSTRACT:
An apparatus includes an interleaver configuration for at least one of combining or separating odd and even channel groups to achieve channel density doubling; and an optical equalizer for suppressing inter symbol interference within the channels to provide intra-channel equalizing in the optical path, the equalizer being integrated into the interleaver. Preferably, optical equalizer and interleaver are integrated together as a single monolithic device, the optical equalizer includes a passband that has a dip in the channel center to achieve a raised-cosine filtering profile in the optical signal path to achieve inter-symbol interference ISI suppression, and the equalizer includes integration into the optical path of the interleaver to realize a monolithic device combining or separating odd and even channel groups to achieve channel density doubling. Preferably, also, the optical equalizer includes a first equalizer with half the depth of required ripple dips at both a first output port and an input port and a second equalizer with half the depth of required ripple dips at a second output port.

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