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. 20, 2005
Filed:
Nov. 20, 2000
Wolfgang Dultz, Frankfurt am Main, DE;
Heidrun Schmitzer, Cincinnati, OH (US);
Leonid Beresnev, Columbia, MD (US);
Gisela Dultz, Frankfurt am Main, DE;
Wolfgang Dultz, Frankfurt am Main, DE;
Heidrun Schmitzer, Cincinnati, OH (US);
Leonid Beresnev, Columbia, MD (US);
Gisela Dultz, Frankfurt am Main, DE;
Deutsche Telekom AG, Bonn, DE;
Abstract
To provide a phase modulator for introducing a topological phase, which is designed to produce any desired phase shift between zero and 360°, the phase modulator has means, at least one double-refractive, electrooptical delay element having a rotatable indicatrix, which is/are used to direct the polarization of the light, during transmission through the modulator, over at the light one closed path on the Poincaré sphere, the indicatrix rotating in accordance with the predefined phase shift, and the total encircled surface on Poincaré sphere being equal in terms of absolute value to φ.