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. 18, 2000
Filed:
Oct. 09, 1998
Shoichiro Matsuo, Sakura, JP;
Masahiro Horikoshi, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
A dispersion-shifted optical fiber (DS-fiber) is structured so that it has nearly zero chromatic dispersion in the 1.55 .mu.m wavelength band and, at the same time, achieves both reduced non linear effects and low dispersion slope. In particular, dispersion slope is reduced to a level sufficient for the fiber to be used for wavelength division multiplexing (WDM) applications. The properties of the fiber are developed such that chromatic dispersion in the 1.55 .mu.m band is nearly zero but not zero, effective cross section area is 45.about.70 .mu.m.sup.2, bending loss is 0.1.about.100 dB/m, dispersion slope is 0.05.about.0.08 ps/km/nm.sup.2, and the cutoff wavelength is such that transmission is always single-mode transmission within the 1.55 .mu.m band. Such a DS-fiber has sufficiently large effective cross section area Aeff, low bending loss and small dispersion slope to make the fiber suitable for use in WDM transmission systems.