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:
Jan. 08, 2002
Filed:
Apr. 08, 1999
Applicant:
Inventor:
Tomas Brenner, Severna Park, MD (US);
Assignee:
Ciena Corporation, Linthicum, MD (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/26 ; H04J 1/402 ;
U.S. Cl.
CPC ...
G02B 6/26 ; H04J 1/402 ;
Abstract
In accordance with the present invention, an optical device is provided which selects narrowly spaced optical channels used in dense wavelength division multiplexed systems. The device includes a first and second Bragg gratings in a cascaded configuration where each grating has a length which is shorter than a single grating configured to select a channel within a narrowly spaced channel plan. When taken together, the two Bragg gratings provide a narrow bandwidth wavelength selection device for narrowly spaced optical channels while avoiding manufacturing drawbacks associated with writing long gratings.