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:
Oct. 15, 2002
Filed:
Jul. 18, 2000
Masao Tsukitani, Yokohama, JP;
Eisuke Sasaoka, Yokohama, JP;
Eiji Yanada, Yokohama, JP;
Yuichi Ohga, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
The present invention relates to an optical transmission line suitably used for a large-capacity high-speed WDM optical transmission system, and an optical fiber suitably used for such an optical transmission line. The optical transmission line is formed by connecting a single-mode optical fiber (SMF) and a dispersion compensating optical fiber (DCF). The dispersion compensating optical fiber has a dispersion value D (unit: ps/nm/km) and dispersion slope S (unit: ps/nm /km) falling within the ranges of −82 ≦D ≦−29 and 0.0023×D ≦S ≦0.033+0.0015×D at a wavelength of 1,550 nm, respectively. At the wavelength of 1,550 nm, the transmission loss is 0.5 dB/km or less. Letting L be the length of the dispersion compensating optical fiber, and L be the length of the single-mode optical fiber, the value L /(L +L ) in the optical transmission line is 0.2 to 0.4. This optical transmission line can suppress the nonlinear optical phenomenon and is suitable to long-distance large-capacity transmission because the optical transmission line has a small transmission loss and low nonlinear index.