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. 24, 2002
Filed:
Sep. 26, 2000
Applicant:
Inventors:
Erwan Pincemin, Gommenec'h, FR;
Sébastien Bigo, Palaiseau, FR;
Assignee:
Alcatel, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/26 ; G02B 6/27 ; H04B 1/500 ;
U.S. Cl.
CPC ...
G02B 6/26 ; G02B 6/27 ; H04B 1/500 ;
Abstract
The invention relates to apparatus for limiting noise in the “zeros” of optical RZ signals, the apparatus comprising a birefringent fiber for mutually spectrally offsetting the signals as a function of their intensity, and a filter for filtering the offset signals. The filter attenuates the pulses that correspond to “zeros”, but passes the pulses that correspond to “ones”. The invention makes it possible to limit the noise in the “zeros” of an RZ signal.