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:
Aug. 09, 2005
Filed:
Jun. 13, 2003
Akira Sakamoto, Sakura, JP;
Satoshi Okude, Sakura, JP;
Akira Sakamoto, Sakura, JP;
Satoshi Okude, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
A variable optical fiber grating is provided which is compact, and in which an amount of chromatic dispersion can be effectively varied without changing an operating center wavelength. Also provided is a dispersion compensator, which uses this variable optical fiber grating. The fixing member is formed by providing an outer cylindercomprising a material with a lower coefficient of linear expansion around an inner cylindercomprising a material with a higher coefficient of linear expansion, and an optical fiber grating is fixed in a grooveformed on the inner cylinder. By adjusting the fixing position of the optical fiber grating, an expansion coefficient and contraction coefficient of the optical fiber grating which follows the expansion and contraction of the material with the higher coefficient of linear expansion, differ along the longitudinal direction of the optical fiber grating, so that an amount of chromatic dispersion is controlled.