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:
Mar. 21, 2006
Filed:
Mar. 11, 2002
Harm Van Weerden, NL-7521 PV Enschede, NL;
Hindrik Freerk Bulthuis, NO-7521 PV Enschede, NL;
Richard Ian Laming, Livingston, GB;
Harm Van Weerden, NL-7521 PV Enschede, NL;
Hindrik Freerk Bulthuis, NO-7521 PV Enschede, NL;
Richard Ian Laming, Livingston, GB;
Other;
Abstract
An arrayed waveguide grating (AWG) device () comprising a substrate having a first array of waveguides () optically coupled between first and second slab couplers () and a second array of input-output waveguides () optically coupled at first ends thereof to an input/output side () of the second slab-coupler (). The input/output waveguide are tapered at first end portions () thereof so as to increase in width towards the second slap coupler, and the width (W) of the first ends of the input/output waveguides varies across the second array () in a manner so as to increase uniformity of at least on performance parameter, for example adjacent crosstalk (AXT). In the described embodiment, the width (W) of the tapered waveguide ends increases from one side to the array of input/output waveguides () to the other, so as to keep the separation (s) between the input/output waveguides.