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:
May. 17, 2005
Filed:
Sep. 30, 2002
Mark George Romo, Eden Prairie, MN (US);
Liang-ju LU, Eden Prairie, MN (US);
Charles Ray Willcox, Eden Prairie, MN (US);
Stanley Edward Rud, Jr., Victoria, MN (US);
Mark George Romo, Eden Prairie, MN (US);
Liang-Ju Lu, Eden Prairie, MN (US);
Charles Ray Willcox, Eden Prairie, MN (US);
Stanley Edward Rud, Jr., Victoria, MN (US);
Rosemount Inc., Eden Prairie, MN (US);
Abstract
A variable optical attenuator has a first movable waveguide support and a second waveguide support that include first and second waveguides, respectively, such that the first and second waveguides are aligned for propagating an optical energy. An electrically driven actuator positions the movable waveguide support for coupled, optical misalignment relative to the second support to achieve a desired optical attenuation value. The movable waveguide support may be in a cantilevered configuration in which a distal end extends over a surface having an electrode. In this example, applying a drive signal to the electrode deflects the movable support such that the signal coupled between the first waveguide to the second waveguide is attenuated. The drive signal may be set to achieve a desired value for an electrical parameter that varies with the position of the movable waveguide support. In some examples, the drive signal is set to achieve a desired capacitance or voltage difference between the movable waveguide support and the electrode.