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. 31, 1992
Filed:
Sep. 19, 1990
Applicant:
Inventors:
Hiroyuki Sasaki, Tokyo, JP;
Masato Shimamura, Tokyo, JP;
Yoshiaki Takeuchi, Mito, JP;
Hiroaki Hanafusa, Mito, JP;
Juichi Noda, Mito, JP;
Assignees:
Japan Aviation Electronics Industry Limited, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385 43 ; 359900 ; 385 51 ;
Abstract
Two single mode optical fibers are reduced in diameter over a predetermined length to form reduced-diameter portions whose center portions have different diameters. The two optical fibers are intersected at a small angle to each other substantially centrally of their reduced-diameter portions and then are fused together at the intersecting portions and the fused portions of the two optical fibers are heated and stretched to provide an optical coupler having a desired coupling ratio.