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:
Nov. 02, 2004
Filed:
Jan. 31, 2003
Daniel H. Raguin, Acton, MA (US);
John R. Marciante, Webster, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
The invention is directed to metal-free grating for use in wavelength optical communications, and in particular to metal-free, reflective immersed diffraction gratings. The gratings of the invention area made of at least a first material of refractive index n and a second material of refractive index n . Materials and must obey the Expressions: (I) n >n , (II) n >&lgr;/2L>n for single diffracted order at Littrow, and (III) n /n <Sin|&thgr; |<1; wherein &lgr; is the wavelength of the light incident on the grating, &thgr; represents any and all propagation angles of incident and diffracted light, and L is the grating period. The grating profile is located at the interface of material and to material . In one embodiment, the grating profile is made from additional material and of refractive index n and n , respectively, and is placed between materials and . In another embodiment the grating is made from silicon.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile