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:
Feb. 01, 2000
Filed:
Feb. 12, 1998
Applicant:
Inventor:
Steffen D Koehler, Annapolis, MD (US);
Assignee:
Ciena Corporation, Linthicum, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385 24 ; 385 14 ; 385 37 ; 385-8 ; 359115 ; 359118 ; 359124 ;
Abstract
A WDM ring configuration having reduced adjacent channel cross-talk is disclosed. In the WDM ring, an add/drop element having a filter for selecting an optical signal at a desired wavelength is spaced from another add/drop element having a filter adding an optical signal at an adjacent wavelength within a channel plan by at least one add/drop element that adds/drops an optical signal at a wavelength which is not next to either the optical signal at the desired wavelength or the adjacent wavelength.