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:
Sep. 02, 2008
Filed:
Apr. 05, 2007
Takayuki Maehara, Kawasaki, JP;
Shinichirou Harasawa, Kawasaki, JP;
Gentaro Funatsu, Yokohama, JP;
Hideki Maeda, Yokohama, JP;
Akira Naka, Yokosuka, JP;
Takayuki Maehara, Kawasaki, JP;
Shinichirou Harasawa, Kawasaki, JP;
Gentaro Funatsu, Yokohama, JP;
Hideki Maeda, Yokohama, JP;
Akira Naka, Yokosuka, JP;
Fujitsu Limited, Kawasaki, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
In a method for performing OTDR measurement in an optical transmission system including a first terminal station and a second terminal station, OTDR signal light is transmitted from an OTDR provided in the first terminal station to the second terminal station, in which the OTDR signal light is Raman amplified by using main signal light of the optical transmission system as pump light.