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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.:

US 8867911 B1

PDFFull Text
Date of Patent:
Oct. 21, 2014

Filed:

Aug. 29, 2012

Device to determine a phase difference of in-phase and quadrature component of signal light, and a method to determine the phase difference

Applicant:

Yoshihiro Tateiwa, Yokohama, JP;

Inventor:

Yoshihiro Tateiwa, Yokohama, JP;

Assignee:

Sumitomo Electric Industries, Ltd., Osaka-shi, JP;

Attorneys:

Venable LLP

Michael A. Sartori

George L. Howarah

Primary Examiner:

Shi K Li

Assistant Examiner:

Mina Shalaby

Int. Cl.
CPC ...
H04B 10/08 (2006.01); H04B 17/00 (2006.01); H04B 10/06 (2006.01); H04B 10/61 (2013.01); G01J 9/00 (2006.01); H04L 27/36 (2006.01); H04L 27/38 (2006.01);
U.S. Cl.
CPC ...
H04B 10/6165 (2013.01); G01J 9/00 (2013.01); H04L 27/364 (2013.01); H04L 27/3863 (2013.01);
Abstract

A device able to evaluate a phase difference between I-component and Q-component of signal light generated by an optical hybrid is disclosed. The device includes a detector, a compensator and an evaluator. The detector detects positive and negative elements of each of the I-component and the Q-component. The compensator generates a compensated I-component and a compensated Q-component so as to keep the sum of positive and negative elements of each of components in constant. The evaluator determines the phase difference via an ellipsoid drawn by the compensated I- and Q-components.

Find Patent Forward Citations

Tateiwa, Yoshihiro. (2014). Device to determine a phase difference of in-phase and quadrature component of signal light, and a method to determine the phase difference (U.S. Patent No. 8867911). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8867911

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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