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:
Nov. 11, 2003
Filed:
Nov. 07, 2001
Applicant:
Inventors:
Minoru Yoshida, Hyogo, JP;
Kazuo Imamura, Hyogo, JP;
Tadahiko Nakai, Hyogo, JP;
Yasuhide Sudo, Hyogo, JP;
Assignee:
Mitsubishi Cable Industries, Ltd., Hyogo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/34 ;
U.S. Cl.
CPC ...
G02B 6/34 ;
Abstract
A long period grating ( ) by which an excitation light propagated through the 2nd core ( ) of a double-core type optical fiber composed of the 2nd core ( ) formed on the outer circumference of the 1st core ( ) is guided into the 1st core ( ) is formed on the 1st core ( ) to improve an excitation efficiency.