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:
Apr. 14, 2020
Filed:
Jul. 26, 2019
Southern Methodist University, Dallas, TX (US);
Orade International Corporation, Redwood Shores, CA (US);
Gary A. Evans, Plano, TX (US);
Jerome K. Butler, Richardson, TX (US);
Jay B. Kirk, Plano, TX (US);
Ruo-Hua He, Dallas, TX (US);
Jin Yao, San Diego, CA (US);
Guoliang Li, San Diego, CA (US);
Xuezhe Zheng, San Diego, CA (US);
Ashok V. Krishnamoorthy, San Diego, CA (US);
Southern Methodist University, Dallas, TX (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
The present invention includes an optical waveguide with a grating and a method of making the same for increasing the effectiveness of the grating. In one example, the grating is at least partially covered by a liner layer disposed on at least a portion of a grating; and a cover layer disposed on the liner layer, wherein a first material selected for the core and ridges and a second material selected for the liner layer are selected to provide a difference in the index of refraction between the first and second material that is sufficient to provide a contrast therebetween.