The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 07, 1999
Filed:
Dec. 15, 1997
Robert J Davies, Calgary, CA;
Telecommunications Research Laboratories, Edmonton, CA;
Abstract
An apparatus for implementing post-detection dispersion compensation on a minimum-phase optical single sideband signal propagating along an optical fiber, in which the optical fiber induces phase distortion on the minimum-phase optical single sideband signal. The apparatus comprises a first envelope detector adapted to be coupled with the optical fiber and having as output an envelope signal representing the envelope of the minimum-phase optical single sideband signal, a phase synthesizer connected to the output of the first envelope detector for generating a phase signal representing the phase of the minimum-phase optical single sideband signal, a combiner having as input the envelope signal and the phase signal and having as output a complex signal whose phase is obtained from the phase signal and whose amplitude is obtained from the envelope signal, a complex antidispersive filter connected to receive the complex signal and configured to remove optical fiber induced phase distortion from the complex signal to produce a filtered output; and a second envelope detector connected to the complex antidispersive filter to recover an information signal from the filtered output. A corresponding method of post-detection dispersion compensations is also disclosed.