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:
Mar. 05, 2013
Filed:
Jul. 07, 2006
Akihiro Tanaka, Tokyo, JP;
Akio Tajima, Tokyo, JP;
Seigo Takahashi, Tokyo, JP;
Wakako Maeda, Tokyo, JP;
Akihiro Tanaka, Tokyo, JP;
Akio Tajima, Tokyo, JP;
Seigo Takahashi, Tokyo, JP;
Wakako Maeda, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A sender transmits to a receiver an optical signal that is phase-modulated in accordance with source data and a basis stored in a memory. The receiver phase-modulates the received optical signal in accordance with a basis, obtains detection data through interference, and stores the detection data in a memory. An inter-device address difference (G) and an intra-device address difference (D) are provisionally set. The detection data are checked against the source data while sequentially changing the values of Gand Dwithin a predetermined adjustment range. Based on the result of this checking, Gand Dare determined.