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:
May. 20, 2008
Filed:
Jun. 30, 2004
Yoshinori Kurosawa, Tokyo, JP;
Bing Yao, Tokyo, JP;
Kazumasa Ohsono, Tokyo, JP;
Masao Tachikura, Tokyo, JP;
Hisanori Nakai, Tokyo, JP;
Toshio Kurashima, Tokyo, JP;
Eiji Araki, Tokyo, JP;
Katumi Hiramatu, Tokyo, JP;
Yoshinori Kurosawa, Tokyo, JP;
Bing Yao, Tokyo, JP;
Kazumasa Ohsono, Tokyo, JP;
Masao Tachikura, Tokyo, JP;
Hisanori Nakai, Tokyo, JP;
Toshio Kurashima, Tokyo, JP;
Eiji Araki, Tokyo, JP;
Katumi Hiramatu, Tokyo, JP;
Hitachi Cable, Ltd., Tokyo, JP;
Nippon Telegraph and Telephone Corp., Tokyo, JP;
Abstract
An optical fiber which, at an optical fiber connecting end having a plurality of voids around the periphery of a core, has a light-permeable substance, such as a resin or glass whose refractive index is lower than that of quartz type substances, filled in the voids adjacent to the connecting end. An optical fiber connecting section where an optical fiber having a plurality of voids in a clad around the periphery of a core is connected to another optical fiber, wherein the optical fiber is connected end-to-end to aforesaid another optical fiber through a refractive index matching agent whose refractive index at the minimum temperature in actual use is lower than that of the core.