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:
Nov. 21, 2006
Filed:
Aug. 07, 2003
Ping Wai Wan, Ottawa, CA;
Derrick Remedios, Ottawa, CA;
Dan Oprea, Ottawa, CA;
Patrick Chilufya Chimfwembe, Ottawa, CA;
Ping Wai Wan, Ottawa, CA;
Derrick Remedios, Ottawa, CA;
Dan Oprea, Ottawa, CA;
Patrick Chilufya Chimfwembe, Ottawa, CA;
Tropic Networks Inc., Kanata, CA;
Abstract
An optical add/drop multiplexing (OADM) apparatus and method are disclosed for detecting pilot tones, removing ghost tones, and re-inserting pilot tones on WDM signals in an optical network. The OADM apparatus comprises a smart processing and control unit (PCU) for detecting pilot tones used for channel identifications, including identifying and removing ghost tones associated with respective optical channels, and re-inserting the processed pilot tones into the respective optical channels. The OADM apparatus and method may incorporate digital PCU or analog PCU for processing pilot tones and removing ghost tones.