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:
Jul. 07, 2015
Filed:
Mar. 05, 2012
Jingshi LI, Karlsruhe, DE;
Matthias Lauermann, Neuenstein, DE;
Sven Schüle, Weingarten, DE;
Juerg Leuthold, Walzbachtal, DE;
Wolfgang Freude, Karlsruhe, DE;
Jingshi Li, Karlsruhe, DE;
Matthias Lauermann, Neuenstein, DE;
Sven Schüle, Weingarten, DE;
Juerg Leuthold, Walzbachtal, DE;
Wolfgang Freude, Karlsruhe, DE;
KARLSRUHER INSTITUT FUR TECHNOLOGIE, Karlsruhe, DE;
Abstract
An optical detector for detecting an optical signal beam (OSB) modulated in a way that it includes an in-phase and/or a quadrature component, includes: a polarization beam splitter arranged to split the OSB into two polarized OSBs; a non-polarization beam splitter arranged to further split each of the two polarized OSBs into two split polarized OSBs; at least one birefringent element providing a phase shift, the birefringent element being arranged in a path of at least one polarized OSB and/or in a path of at least one split polarized OSB so that an in-phase and quadrature phase offset between two split polarized OSBs originating from the same polarized OSB is formed in output signal beams; and at least two detection means arranged to receive at least one output signal beam that includes a in-phase and/or quadrature component of the OSB.