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. 22, 2015
Filed:
Apr. 14, 2014
Oracle International Corporation, Redwood City, CA (US);
John E. Cunningham, San Diego, CA (US);
Jin Yao, San Diego, CA (US);
Ivan Shubin, San Diego, CA (US);
Guoliang Li, San Diego, CA (US);
Xuezhe Zheng, San Diego, CA (US);
Shiyun Lin, San Diego, CA (US);
Hiren D. Thacker, San Diego, CA (US);
Stevan S. Djordjevic, San Diego, CA (US);
Ashok V. Krishnamoorthy, San Diego, CA (US);
ORACLE INTERNATIONAL CORPORATION, Redwood Shores, CA (US);
Abstract
An integrated optical device includes an electro-absorption modulator disposed on a top surface of an optical waveguide. The electro-absorption modulator includes germanium disposed in a cavity between an n-type doped silicon sidewall and a p-type doped silicon sidewall. By applying a voltage between the n-type doped silicon sidewall and the p-type doped silicon sidewall, an electric field can be generated in a plane of the optical waveguide, but perpendicular to a propagation direction of the optical signal. This electric field shifts a band gap of the germanium, thereby modulating the optical signal.