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:
Jun. 15, 1999
Filed:
Jan. 29, 1998
Yoshiaki Terasawa, Yokohama, JP;
Takatoshi Kato, Yokohama, JP;
Fumiyoshi Ohkubo, Yokohama, JP;
Yosuke Yamazaki, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
The present invention relates to an S-mode optical fiber having a structure which can effectively restrain dispersion slope from increasing. In this S-mode optical fiber, an optical core is constituted by inner and outer cores, while an optical cladding is constituted by an inner cladding in which 'tailing' occurs and an outer cladding. In a cross section of the S-mode optical fiber perpendicular to its signal light propagating direction, when surface integral values of relative refractive index difference with respect to a reference region having an average refractive index n.sub.0 are S1 and S2 in the optical cladding and optical core, respectively, the S-mode optical fiber is designed to satisfy a relationship of 0<S1/S2.ltoreq.0.3. As a result of this configuration, it can effectively restrain dispersion slope from increasing due to 'tailing' which inevitably occurs during its manufacturing process.