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. 10, 1991
Filed:
Jul. 30, 1990
Alfred Ebberg, Munich, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
An arrangement is disclosed for the generation of a FSK-modulated optical signal having two polarization states which are orthogonal to each other from a FSK-modulated optical transmitted signal. The arrangement is formed of a polarizing beam splitter which generates from the polarized transmitted signal two signal components with orthogonal polarization states, and which are reflected back into themselves and superimposed via allocated reflectors. Before the superimposing the polarization state of each signal component is converted into a polarization state orthogonal thereto, and thus the optical path lengths between the polarizing beam splitter and the reflectors differ by a certain amount. The arrangement is useful for optical superheterodyne reception.