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. 30, 2005
Filed:
Oct. 16, 2002
Kazuhiko Aikawa, Sakura, JP;
Shogo Shimizu, Sakura, JP;
Takaaki Suzuki, Sakura, JP;
Ryuji Suzuki, Sakura, JP;
Masakazu Nakayama, Sakura, JP;
Kuniharu Himeno, Sakura, JP;
Kazuhiko Aikawa, Sakura, JP;
Shogo Shimizu, Sakura, JP;
Takaaki Suzuki, Sakura, JP;
Ryuji Suzuki, Sakura, JP;
Masakazu Nakayama, Sakura, JP;
Kuniharu Himeno, Sakura, JP;
Fujikura, Ltd., Tokyo, JP;
Abstract
A dispersion compensating fiber, which has a negative dispersion slope with a large absolute value while maintaining the absolute value of the chromatic dispersion, and which has sufficient dispersion slope compensation properties even for the non-zero dispersion shifted optical fiber requiring a large RDS for dispersion compensation. In this dispersion compensating fiber, the radius of a ring core region is set in a range from 6.7 μm to 10.7 μm, the radius ratio of a depressed core region relative to a central core region is set in a range from 2.0 to 3.0, and the radius ratio of the ring core region relative to the depressed core region is set in a range from 1.3 to 2.0, the relative refractive index difference of the central core region relative to the cladding is set in a range from +1.00% to +1.80%, the relative refractive index difference of the depressed core region relative to the cladding is set in a range from −1.20% to −1.50%, and the relative refractive index difference of the ring core region relative to the cladding is set in a range from +0.20% to +0.50%.