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. 28, 2004
Filed:
Mar. 05, 2003
Arthur G. Wilson, Melbourne, FL (US);
Richard DeSalvo, Satellite Beach, FL (US);
JDS Uniphase Corporation, San Jose, CA (US);
Abstract
The invention relates to a method for the estimation of chromatic dispersion in multichannel optical network spans during active operation. The invention further discloses a chromatic dispersion monitor for real time monitoring of accumulated dispersion in individual channels. The method effectively estimates accumulated chromatic dispersion by obtaining a contour map of the eye diagram correlating more than three points for measuring at least two parameters to known dispersion. This can provide accurate BER indication before failure occurs and provide indication of the sign of dispersion for faster correction. A chromatic dispersion monitor includes a high speed linear receiver to receive individual channel signals from a tunable filter, a clock recovery circuit with a variable time delay device for obtaining points to establish the contoured eye map and a processor for calculating metric values from the contoured eye map and correlating the calculated metric vales to a stored library of accumulated chromatic dispersion.