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:
Apr. 24, 2007
Filed:
Mar. 10, 2005
Hiroki Tanaka, Tokyo, JP;
Yasuo Nakajima, Tokyo, JP;
Mitsunori Okada, Tokyo, JP;
Norimitsu Takaishi, Tokyo, JP;
Kenichi Mizoguchi, Tokyo, JP;
Hidetoshi Yasui, Tokyo, JP;
Hiroki Tanaka, Tokyo, JP;
Yasuo Nakajima, Tokyo, JP;
Mitsunori Okada, Tokyo, JP;
Norimitsu Takaishi, Tokyo, JP;
Kenichi Mizoguchi, Tokyo, JP;
Hidetoshi Yasui, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
An optical fiber tape having low polarization mode dispersion characteristics and applied to a dense wavelength multiplex (DWDM) transmission system of a transmission rate from several Gb/s to several tens of Gb/S. We have found out that the polarization mode dispersion of an optical fiber tape relates to the loss tangent (tan δ) determined when the dynamic viscoelasticity is measured, and that particularly, if the loss tangent of when a dispersion shift fiber is used is made 0.080 or more and the loss tangent of when a single mode optical fiber is used is made 0.042 or more, the polarization mode coefficient of dispersion (PMD) is reduced to 0.3 ps/√km preferable to realize a DWDM transmission system.