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:
May. 11, 1999
Filed:
Sep. 26, 1997
Applicant:
Inventor:
Henning Bulow, Stuttgart, DE;
Assignee:
Alcatel Alsthom Compagnie Generale D'Electricite, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
359332 ; 359326 ;
Abstract
A wavelength converter is disclosed having a Sagnac interferometer (NOLM, nonlinear optical loop mirror) as its essential part. In order that the wavelength converter can also be used for NRZ (nonreturn-to-zero) signals, it has a 3.times.3 coupler (2) with six ports (6-11).