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. 20, 2005
Filed:
Nov. 06, 2002
Michael Kevan Durkin, Southampton, GB;
Mikhail Nickolaos Zervas, Southampton, GB;
Michael Kevan Durkin, Southampton, GB;
Mikhail Nickolaos Zervas, Southampton, GB;
Southampton Photonics LTD, Southampton, GB;
Abstract
Apparatus for filtering optical radiation at an operating wavelength (), which apparatus comprises a grating () written into a waveguide (), and which grating () has a first end (), a second end (), a first bandwidth (), a maximum re-flectivity (), a first group delay variation () defined with respect to the first end (), and a second group delay variation () defined with respect to the second end (), wherein the first and second group delay variations (), () are with respect to the first bandwidth (), the maximum reflectivity () is greater than 50%, the first group delay variation () is between 0.1 ps and 100 ps, and the second group delay variation () is between 0.1 ps and 100 ps.