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:
Mar. 18, 2008
Filed:
Jan. 05, 2005
Masashi Ikeda, Sakura, JP;
Masakazu Nakayama, Sakura, JP;
Kuniharu Himeno, Sakura, JP;
Masaaki Ohtsuka, Sakura, JP;
Masakazu Oohashi, Sakura, JP;
Daiichiro Tanaka, Sakura, JP;
Masashi Ikeda, Sakura, JP;
Masakazu Nakayama, Sakura, JP;
Kuniharu Himeno, Sakura, JP;
Masaaki Ohtsuka, Sakura, JP;
Masakazu Oohashi, Sakura, JP;
Daiichiro Tanaka, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
An optical fiber that includes a core containing a first concentration of germanium, an inner cladding arranged on the core, the inner cladding containing a second concentration of germanium and having a first diffusion coefficient, and an outer cladding arranged on the inner cladding, the outer cladding having a second diffusion coefficient, where the first diffusion coefficient is larger than the second diffusion coefficient, and where the first concentration of germanium is about 200% or more of the second concentration of germanium. An optical fiber constructed in this manner can be spliced with an optical fiber having a different MFD, such as a single-mode optical fiber or an erbium-doped optical fiber, with low splice loss and a sufficient splicing strength.