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:
Apr. 24, 2001
Filed:
May. 08, 1998
Applicant:
Inventors:
Mathieu Dutrisac, Ste-Foy, CA;
Richard Achile Habel, Ottawa, CA;
Robert Keys, Kanata, CA;
Franz Li Hsien Mok, Kanata, CA;
Jeffrey Alan Weslowski, Nepean, CA;
Assignee:
Nortel Networks Limited, Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/008 ;
U.S. Cl.
CPC ...
H04B 1/008 ;
Abstract
A fast means of detecting that a fiber has been disconnected at one end of a bidirectional optical amplifier by monitoring for several signature effects simultaneously. Upon detection of a loss of signal, the pump laser in the corresponding direction is shut off quickly to prevent oscillation from occurring should the other end of the amplifier be subsequently disconnected.