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:
May. 23, 2006
Filed:
Nov. 01, 2005
Jingo Adachi, Moriguchi, JP;
Shinichi Wakabayashi, Sagamihara, JP;
Akihiro Itoh, Katano, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
There is provided an apparatus for performing, by optical code division multiplex access, at least one of encoding and decoding of wavelength-division-multiplexed light. The apparatus includes: an optical input/output sectionfor handling input/output of the wavelength-division-multiplexed light; and N fiber gratings (where N is an integer equal to or greater than two)to, which are in a series connection to the optical input/output section. Each of the N fiber gratings has a sampled grating structure having an alternating array of first regions (toto; andto) which provide a refractive index modulation with a relatively large amplitude and second regions () which provide a refractive index modulation with a relatively small amplitude, the first and second regions being disposed with a constant period P. Each sampled grating structure defines a plurality of reflection wavelength bands which are replicated with a period that is equal to the interval (ΔT) between the central wavelengths of wavelength bands contained in the wavelength-division-multiplexed light. The central values of the respective reflection wavelength bands differ from one fiber grating to another at least during operation.