Post detection chromatic dispersion compensation
AssigneeNortel Networks Limited
InventorAndre Van Schyndel
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Abstract
A method and apparatus for compensating, in the electrical domain, for chromatic dispersion of an optical signal is disclosed. A received optical signal is converted to an electrical signal. The spectrum of the electrical signal is amplified by a factor derived from its frequency; and the phase of regions of said spectrum is selectively inverted to thereby allow recovery of the transmitted data. The optical signal may have a non-infinite extinction ratio to improve recovery of the transmitted signal. The square root of the electrical signal may be taken to improve recovery of the transmitted signal
Claims18
A method of compensating, in the electrical domain, for chromatic dispersion of an optical signal, comprising the steps of:
- a) converting said optical signal to an electrical signal;
- b) amplifying parts of the spectrum of said electrical signal by a factor derived from its frequency;
- and
- c) selectively inverting the phase of regions of said spectrum to thereby allow recovery of the transmitted data.
An apparatus for compensating, in the electric domain, for chromatic dispersion of an optical signal, comprising:
- a) signal conversion means for converting said optical signal to an electrical signal;
- b) means for amplifying parts of the spectrum of said electrical signal by a factor derived from its frequency;
- and
- c) means for selectively inverting the phase of regions of said spectrum to thereby allow recovery of the transmitted data.
Dependencies are inferred from the claim text.