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. 31, 2007
Filed:
Jun. 01, 2006
Jingo Adachi, Osaka, JP;
Akihiro Itoh, Kyoto, JP;
Shinichi Wakabayashi, Kanagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An encoder according to the present invention is an encoder for encoding an optical wavelength-multiplexed signal compliant with optical CDMA into a code having a code pattern, including: L optical fibersand(where L is an integer equal to or greater than two) each having a plurality of gratingsto; and a circulatorfor coupling the plurality of optical fibersand. The code pattern contains time bins tto t. A plurality of wavelengths λand λare assigned to the time bin t. If a sum of an optical path difference in each optical fiber from the grating which reflects the optical signal of the wavelength λto the grating which reflects the optical signal of the wavelength λis calculated for all of the optical fibersand, the sum equals zero.