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:
Apr. 27, 2004
Filed:
May. 30, 2002
Tetsuo Suzuki, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
The connecting method of different kind optical fibers of the present invention is a connecting method able to improve the strength of connecting portions of the different kind optical fibers of different mode field diameters. In this connecting method, connecting ends of the different kind optical fibers removing their coating therefrom are mutually butted and fusion-spliced by gripping the coating in a step (S ). Next, the mode field diameters of different kind optical fiber connecting portions are conformed to each other by the heat treatment of a step (S ). This heat treatment is taken within a low dust space having a clean degree of 1000 or less in class. Thus, the heat treatment is taken under an environment in which foreign matters floated around the connecting portions of the different kind optical fibers are very small. Therefore, it is possible to restrain a crack from being caused by burning the foreign matters into the connecting portions. Accordingly, strength deterioration of the connecting portions of the different kind optical fibers caused by the crack can be prevented.