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. 18, 2006
Filed:
Sep. 23, 2004
Teruhiro Kubo, Yokohama, JP;
Teruhiro Kubo, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A polarization state measuring apparatus of the present invention branches an input signal light into a plurality of signal lights by optical couplers, gives polarization and phase shift which are different from each other, to the signal lights by a plurality of optical elements arranged on optical branch paths, detects the power of each of the signal lights by the corresponding light receiving elements, and after adjusting at least differences in the optical branch paths, processes electrical signals output from the light receiving elements, to acquire information related to a polarization state of the input signal light. As a result, it is possible to provide a small size polarization state measuring apparatus which can correct differences in arrival times of the signal lights to the light receiving elements, to thereby measure the polarization state of the input signal light with high accuracy.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile