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:
Jun. 27, 2006
Filed:
Nov. 03, 2003
Wenshen Wang, Torrence, CA (US);
David C Scott, Lakewood, CA (US);
Elizabeth T Kunkee, Manhattan Beach, CA (US);
Wenshen Wang, Torrence, CA (US);
David C Scott, Lakewood, CA (US);
Elizabeth T Kunkee, Manhattan Beach, CA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A PIN electro-optical traveling wave modulator () including diffraction gratings () positioned at opposing sides of an optical waveguide () that act to change the propagation pattern of the waveguide (). The modulator () includes an N-type layer (), a P-type layer () and an intrinsic layer () acting as the waveguide (). A metal electrode () is in electrical contact with the N-type layer (), and a metal electrode () is in electrical contact with the P-type layer (). The electrodes () define an RF transmission line. An optical wave () propagates along the waveguide () and interacts with the gratings () which slow the optical wave () to match its speed to the speed of the RF wave in the transmission line. In one embodiment, the gratings () are 2-D gratings formed by vertical holes () in the waveguide ().