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:
Aug. 28, 2001
Filed:
Jul. 02, 1997
Applicant:
Inventor:
Kim Byron Roberts, Welwyn Garden City, GB;
Assignee:
Nortel Networks Limited, Montreal, CA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 1/004 ; H04B 1/000 ; H04J 1/408 ;
U.S. Cl.
CPC ...
H04B 1/004 ; H04B 1/000 ; H04J 1/408 ;
Abstract
Optical timing detection, for phase comparison of optical signals, or clock recovery is achieved by arranging an interferometer to be responsible to data transitions. A pulse train is fed into both arms of the interferometer. An optical amplifier (,) enables the interference condition to be changed when the data is fed into one arm. The output changed if the data transitions lose synchronization with the pulse train.